Joshua LeatherlandTCS London Marathon 2027

26.2 miles for Leah, and everyone living with type 1 diabetes.

In April 2027, I'll be taking on the London Marathon to raise money for Breakthrough T1D, a cause that means a huge amount to me personally.

Target
£2,500
Distance
26.2 mi
Race day
24 Apr 2027
Joshua Leatherland in training gear for the TCS London Marathon 2027

In training, 2026

01My story

Why I’m running for Leah, and for everyone with type 1.

My girlfriend, Leah, has been living with Type 1 Diabetes (T1D) for the past 4 years. I've seen first-hand that T1D is so much more than simply needing insulin. It's something she has to think about every single day, 24/7.

For someone without T1D, things like eating a meal, going to bed, exercising, travelling or simply going about your day are things you don't normally have to think twice about. With T1D, every one of those things can involve checking blood sugar, calculating carbohydrates, managing insulin and constantly making decisions to keep blood glucose levels in a safe range.

Even when everything is done right, blood sugar can still unexpectedly go too high or too low. There are no days off, and there is currently no cure.

That's why I'm running the London Marathon. I want to do something challenging myself to help raise awareness and support research that could make life better for people like Leah and, one day, help find a cure.

Every donation, no matter how big or small, will help me get closer to my fundraising target and support Breakthrough T1D's work. Thank you so much for supporting me and everyone living with Type 1 Diabetes.

Joshua Leatherland

02About type 1 diabetes

It isn’t what most people think it is.

Type 2 gets most of the headlines, which means type 1 is widely misunderstood. Here’s the short version of what Leah, and everyone else with T1D, actually deals with.

01

An autoimmune condition

Type 1 diabetes happens when the immune system mistakenly destroys the insulin-producing cells in the pancreas. Without insulin, the body can't turn food into energy, so it has to be replaced manually, for life.

02

Nothing to do with diet or lifestyle

It isn't caused by eating too much sugar, being overweight, or anything else within someone's control. It can't be prevented, and it can't be reversed. It often starts in childhood, but can develop at any age.

03

A full-time job with no days off

Living with T1D means constant blood sugar checks, counting carbohydrates in every meal, and calculating insulin doses around exercise, sleep and stress, every day, forever.

04

No cure, yet

Management has improved hugely, but there is still no cure. Breakthrough T1D funds the research working to change that, from better technology today to a cure for tomorrow.

Breakthrough T1D funds research to cure, treat and prevent type 1 diabetes, and gives support and a voice to people with T1D and their families.

More on Breakthrough T1D
03Training clips

Following the miles, one run at a time.

@joshl.fitness on TikTok

Road to Manchester half, marathon training

A tough run that turned into an unexpected sub-30

Another 5K in the bag

Nice and easy 5K run

That one 5K in the heat