October 25, 2022

Pacing London: what it's like to pace London Marathon

You don’t need to be a fast runner to work at Let’s Do This, but that doesn’t stop Let’s Do This data scientist, Simon Wright, from running sub 3 hour marathons in his spare time.

A 2:53:20 marathoner, triathlete and enthusiastic orienteer-er, Simon added yet another string to his bow this month when he paced the 2022 London Marathon.

Read on to hear from Simon himself about his experience as a London Marathon pacer – and how you could get involved too!

Becoming a London Marathon pacer

I like running. But I love maths*. So maybe it’s unsurprising that I found myself drawn to the prospect of pacing for races.

I first got involved in pacing very informally last year, pacing a couple of my colleagues to 10k PBs. After that, I decided to give it a go officially this year at the London Landmarks Half Marathon, managing to soak up the atmosphere while leading around a hardy band of 20 runners to a 1:45 finish. And what better place to look to replicate that feeling than at the London Marathon?

In June, I found out that I’d been selected to pace the race at 3:15, the top end of my three suggested times, which would be a challenge!

So, what is pacing?

The premise is very simple: it’s very common for runners to get very excited on the day of a big race and fly off the line.

Wouldn’t it be great not to have to worry about a burst of adrenaline threatening your race from the off? That’s where pacers come in, to run a consistent pace for the whole race to give you one less thing to worry about.

Preparing to pace

In the run-up to the race, I tuned up with some practice pacing at Wimbledon Common parkrun (mostly successfully!) and then again at The Big Half, getting some experience pacing in a crowded atmosphere.

The most important thing is to make sure you hit the splits. Not going faster than the splits, not “banking time” in case things go wrong, but running at almost exactly the target split the whole time. I did a lot of 6-8 mile runs at this target pace to try and lock in that feeling, so it would be natural on race day.

Race day

Race morning was a 5:30am start. Despite the fact that I had to be at the start earlier than most, there were still plenty of other nervous-looking runners eating breakfast on the train to Blackheath. I went for two bagels with peanut butter and a banana, which is nothing new for me on race day, just slightly more than normal!

By 8am all 76 pacers were congregated in a function room in a hotel to talk through the final bits of logistics. We’d been told to be quiet on the way there as people in the hotel might be asleep, but I think the steel drummer at the front door had already taken care of that! All that was left to do was pick up our flags and our lifelines: the pacing bands (a piece of paper with the split time at every mile) and a 5k board to wear round our wrist to check our progress. Even my maths gets a bit suspect when tired at mile 24!

It wasn’t until I walked to the start that I appreciated the vastness of the event. Over 40,000 people from all over the world at the start line, all nervously waiting to take on the same 26.2 mile challenge, hoping that the forecast wind and rain wouldn’t materialise. After a paradoxically short wait that felt like forever in the pen finding a small crew who were in for 3:15, we were off.

Ready, set, pace!

Strangely, the first couple of miles are a couple of the hardest when pacing – it’s very easy to get swept along with the adrenaline of the masses!

This is particularly true in London as there’s a decent downhill section in the first three miles, so you can get well ahead of schedule. There were no issues this time, getting into the habit of checking the watch at the mile board – 11 seconds ahead at 4 miles, perfect.

The first half of the race was spent chatting to the runners who were following us, most of them raising money for various charities, ticking off the miles and soaking in the atmosphere around Greenwich, Rotherhithe, and the crowd on Tower Bridge.

After we came through half-way 35 seconds up–just as planned–we saw the elite men come the other direction. You can’t help but feel a surge of energy from how quickly they’re still going, 22 miles in!

Sadly over the next 8 miles, most of our original pace group dropped off one by one, still running fantastic times but not quite able to hold the pace. It’s one of the hardest things about pacing, you have to keep going exactly on schedule, and can’t adjust to help people who you’ve been running with for the past 2 hours.

The last 5 miles of the London Marathon are spectacular. I was lucky enough to run the Boston Marathon earlier this year, and the crowds at London may have been even bigger and louder than there. It seemed there was constant noise from Tower Hill, down the Embankment and carrying everyone the whole way to the finish line.

Personally it was quite nice to have worked hard but not feel on the absolute limit in the last few miles, soaking it all in as I picked up a few runners who had faded a bit in the middle but were finishing strong.

I crossed the line in 3 hours, 14 minutes and 37 seconds.

It’s always a relief to stop the watch on the line and realise you’ve managed to pace the race well. Afterwards I managed to catch up with a couple of the runners who had been in the group for the first couple of hours who had still managed to run big Personal Bests – this is why we pace!

How to get into pacing

I’d highly recommend pacing as a totally unique way to experience events.

It’s not quite as tiring (at least not physically) as racing and often you get even more of the atmosphere – mainly because you’re so identifiable and the crowd love cheering for the pacer! It’s also a great way to meet and speak to lots of interesting runners.

Pacing is for everyone – at London there were pacers for finish times from 3 hours through to 7 hours 30 minutes. Provided you can keep going at the pace and you’re friendly and encouraging to everyone around you, you can be involved!

If you are interested, there are sites you can volunteer with that provide pacers for races across the country. Alternatively, Google events you're interested in racing and see if they have pacer opportunities.

As for me, I’m hoping to race the 2023 London Marathon, but I’m already considering my 2024 pace application!

*Maths skills are not required to pace!

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If all that pacing chat got you excited about taking on a big city race for yourself, check out our full list of marathons, and start training for your own incredible race day experience.

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The Challenges Women Face in Running and How It Impacts Participation

Running is often lauded as one of the most accessible sports—just lace up your trainers and go. However, for many women, the barriers to participation go far beyond the logistical. While safety concerns are frequently highlighted, deeper systemic issues like access to the sport and unequal treatment are also preventing more women from running. It was a topic keenly discussed at our In Her Stride panel held at the end of November, with key members of the female running community including Sophie Power, Tasha Thompson, Rehana Mawani and Emily Shane.

Before we kick things off however, we should highlight that female participation in running events is growing, and this is a great thing! According to data from Let’s Do This, women in their 20s are the fastest-growing demographic in event participation this year. However despite this, women are still 16% less likely to run every week compared to men. This disparity is particularly striking given that women report higher levels of personal benefits from running, such as improved fitness, better sleep, and reduced stress.

The reasons for this are complex and personal, however we have broken down three key challenges discussed during our panel and the solutions explored that could help address them.

1. The Pressure of Pace

One of the biggest hurdles for many women is the pressure to run faster. Despite the average UK woman’s running speed of 06:37 min/km (according to Strava), most run clubs don’t cater to this with the slowest pace often around 6 minutes per km. Add to this the relentless focus on personal bests and fast times on social media, and it’s no surprise that many women feel too intimidated to join in.

Thankfully, there are starting to be more people rebelling against this speed obsession, including our panelist, Emily Shane. Emily has been leading the charge to encourage more women to disregard pace and focus on the experience of running to drive uptake amongst women. Initiatives like events without cutoff times and more inclusive pace groups at running clubs are vital to creating a more welcoming environment and broadening the benefits of running to the experience and community.

2. Perception of Sport in Schools

One of the topics hotly discussed was how for many girls, the barriers to enjoying physical activity start at school. Puberty, coupled with changing bodies and fluctuating emotions, can make sports feel daunting and uncomfortable for teenage girls. Research highlights this disparity: only 38% of girls enjoy sport and exercise compared to 53% of boys, and just 26% of girls feel confident in physical activity versus 43% of boys.

The panel emphasised the need to address this such as:

Introducing a wider variety of sports and fitness activities to cater to different interests
Providing more supportive and confidence-boosting PE kits.
Showcasing more female role models in sport to inspire young girls.

By addressing these issues at the school level, we can foster a love of sport that lasts into adulthood.

3. Treatment at Events

This is a topic that panelist Sophie Power, founder of SheRACES is incredibly knowledgeable and passionate about. Even at organised running events, women often experience unequal treatment. From “unisex: t-shirts (which are actually designed for men) to a lack of sanitary products in portaloos, these "small things" can collectively make women feel like an afterthought. Prize money inequality and rigid event policies—like no deferral options for pregnant or postpartum women—further highlight these disparities.

Thankfully, initiatives like the 50:50 campaign by Threshold (a campaign to get 50% of women at Ultra startlines vs. the current average of 30%) and the advocacy work of SheRACES are driving change, and there are many amazing event organisers such as Maverick, Threshold, Why We Run and many more, that are working hard to make their events are inclusive as possible for women.

Despite these challenges, the panel and attendees felt overwhelmingly optimistic about the future of running for women and the benefits it brings us. Progress is being made, however we all need to add our voices to the conversation to help more women get into the sport and reap the benefits.

Some Helpful Resources‍

Here are a few helpful resources. This list isn’t exhaustive by any means, however is a good starting point for those looking for inspiration on where to start.

Female friendly events:

Female Only Run Clubs

From Radio to Race Day: Hattie Pearson’s Path to Endurance Event Glory

Hattie Pearson is the type of person who doesn’t just dabble in fitness (or most things…!) She dives in headfirst, often with no hand-holding (except, perhaps, metaphorically). From her first triathlon in 2021 to a series of jaw-dropping endurance feats in 2024, she’s been redefining what’s possible with determination, community, and a big ‘YES’ attitude.

Just say YES

Hattie’s ‘yes’ streak started when a friend and her decided to do a sprint triathlon together. “We had such a great time,” Hattie recalls, “and I was like, I want to do more of this.” That spark quickly turned into a blaze of ambition. By the following year, she was competing in Outlaw triathlons and even signing up for a full-distance Ironman—before completing her first half-distance event. “I didn’t give myself the choice to not carry on,” she says.

The Power of Community

For Hattie, discovering the 10IronWomen network—a group committed to gender parity in triathlons—was a game-changer. “It’s amazing to see a community encouraging women and non-binary folk to show up,” she explains. “Seeing others doing it made me think, I want to be a part of this.” That sense of solidarity and shared purpose has been a recurring theme, whether she’s lacing up for a winter triathlon in the Alps or a grueling ultra-marathon closer to home.

A Year of Big Goals

This year, Hattie set herself a dizzying list of challenges. She swam 500 kilometers (yep, that’s half a million meters!) and tackled a range of events, including a winter triathlon complete with ski touring, the Étape du Tour cycling challenge, and her first ultra-marathon. Each was hard in its own way—whether it was battling snowy trails with crampons or smashing out seven-and-a-half-minute miles for 13.1 miles. But for Hattie, the difficulty is the point. “Every time I achieve something I thought was impossible, I remind myself: I can do hard things.”

Balance and Burnout

With goals that ambitious, fitting it all in can be a challenge. Early mornings help. “I’m one of those people who can get up at 5:00 a.m,” Hattie admits, however it also takes a lot of discipline. With her work on Hits Radio starting later in the day, she carves out time for training, dog walks, and the occasional tantrum over broken goggles. “I’ve definitely had those ‘forgetting-my-swimming-costume’ moments,” she laughs. But her key to staying motivated is simple: keep it fresh and fun. Whether it’s joining her triathlon club for training or trying a completely new event, keeping it fun and different is the secret to staying motivated and on track to reach your goals.

Advice for Aspiring Endurance Athletes

For anyone looking to follow in her footsteps (or strokes), Hattie has this advice:

Be patient. Results don’t come overnight, and the journey is as important as the destination.
Stop comparing. “Your journey is completely your own. Social media only shows the highlights,” she reminds us.
Find your community. Whether it’s a running club, a neighbor for early morning jogs, or an online network, accountability and camaraderie make all the difference.

What’s Next for Hattie?

In 2025, Hattie plans to tackle her first multi-day event, the Monster Triathlon. Admittedly it is as scary as it sounds, kicking off with a 5K swim in Loch Ness, followed by a 1,000-kilometer bike ride to Windsor, and wraps up with a casual 50K run to London(!). Her goals also include more open-water swimming, trail running, and maybe—just maybe—an even bigger endurance challenge. (Though definitely not swimming the English Channel: “No way am I swimming through jellyfish without a wetsuit!”)

Hattie Pearson’s journey is more than a personal triumph. It’s a testament to the power of showing up, saying yes, and proving that with the right mindset, anything is possible. Whether you’re tackling your first 5K or dreaming of an ultra-marathon, Hattie’s story is proof that the finish line is worth the hard miles. And when you cross it? You’ve won your race—medal or not. 🏅

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Make your own electrolyte drink

Why spend on expensive sports drinks when you can make a natural, hydrating electrolyte drink right at home? With just a few simple ingredients, you can create a refreshing blend packed with essential minerals and hydration-boosting properties. Perfect for fueling your workout or post-run recovery, this homemade option keeps it natural, affordable, and effective.

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Ingredients:

1 pinch of high-quality sea salt
Small piece of fresh ginger, peeled
500ml coconut water (e.g., Rebel Kitchen)
Juice of 1 lime
Fresh mint leaves

Instructions:

Prepare Salt & Ginger: Add a pinch of sea salt and the peeled ginger to a blender.
Add Coconut Water & Lime: Pour in the coconut water, squeeze in the lime juice, and add a few mint leaves.
Blend & Serve: Blend until smooth, pour into a glass, and garnish with extra mint. Enjoy your refreshing, hydrating drink!

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