Jamie Lee Jenkins: Can’t decide if watching the London marathon whilst attempting to run on the treadmill is inspiring me or tiring me out. To all the guys and gals running it today - GOOD LUCK!! You guys are amazing.

K Walker: Good luck to everyone taking part in today! Having watched my mum complete it twice, it’s definitely one of the most inspirational and emotional events going.

Claire Bear: Just came home from an early morning 10k, watching the London Marathon and wondering could it be this time next year for me?

...and Tom is going to speak with finishers behind the finish line. Just select the 'Live with finishers behind the finish line' stream above.

Image source, BBC Sport

Image source, BBC Sport

Tom Gayle
BBC Get Inspired reporter at the finish line

The runners have been checking out and discussing the performance of the elites. Cries of “yes, Mo” and “wow, Lily” amongst the conversation.

Image source, BBC Sport

Kathrine Switzer was the first women to enter and complete the Boston marathon back in 1971.

During the race an official entered the course, attempted to stop her competing and tried to remove her race bib.

She spoke on BBC One about the day and competing in her first London Marathon today, with the same bib number she wore back in 1971.

"It wasn't an easy ride," she said. "I was welcomed by all of the men and then a-mile-and-a-half into the race the official jumped off the bus and attacked me because I was a woman in his race.

"At the time it was a terrible moment. The pictures went around the world and I went on to finish and it changed my life and the lives of millions of women.

"It is all about women's empowerment. Of the thousands of women running today they are not running to be Olympic atheltes but to feel good and be confident and be full of self esteem. We are hoping more women put one foot in front of the other and overcome their fearfulness."

Watch more of her story in the video below.

Tom Gayle
BBC Get Inspired reporter at the finish line

Carly is a new Guiness world record holder for the fastest female dressed as a cheer leader - three hours, 27 minutes, 14 seconds

Image source, BBC Sport

On your marks, get set, bake! No, we mean run!

A bakers dozen of contestants from The Great British Bake Off will be taking part in today's marathon.

But the 13 runners are not the only celebrities who you may spot today. Let's hope Gordon Ramsay doesn't have a nightmare and Chris Evans can keep down his big breakfast.

Here's a list of other celebs taking part. , external

Image source, Getty Images

One of the firefighters from Paddington fire station has been speaking to Radzi, who's in position on Tower Bridge, on BBC TV.

"We are doing it in our full fire-fighting gear, it weighs about 30kg all together," he says.

"It's a bit hot, we were advised to take if off after a mile but we felt strongly that we want to keep it on, for the people of Grenfell.

"It was a massive incident that affected the whole country and we are privileged that we are in a position that we can raise money and give it back."

Good luck to firefighters from the Paddington & Kensington fire services who are running this year's race to raise money for children affected by the Grenfell Tower Fire tragedy.

Firefighters Justin O'Beirne and Tom Abell from the service - who were some of the first crews on the scene of the fire - explain why they are taking part in the marathon.

Our favourite costume so far.

How on earth are Batman and Robin dealing with the heat?!

Harry Hawes

One person who will be thankful for this weather is journalist Bryony Gordon, external - she's running the London Marathon today in her underwear, raising awareness for body confidence.

Good luck!

Image source, Twitter - @byrony_gordon

BBC Two

We're switching over the coverage to BBC Two.

Adjust your TVs accordingly.

You can watch live at the top of this page, too.

Paula Radcliffe
Women's marathon world record holder on BBC One

It never disappoints, does it?

We see something special and phenomenal that really embodies human spirit every year.

It's such a privilege to stand on the finish line and see people crossing it - achieving their dreams.

Tom Gayle
BBC Get Inspired reporter at the finish line

Image source, BBC Sport

Jay in the finish area, who was running in honour of his dad Alastair, who died two weeks ago.

What do you say when someone tells you that. Amazing.

"I was an overweight mum who figured out life just couldn't go on the way it was," says 29-year-old Claire O'Hara from Liverpool.

After giving birth to son William prematurely in December 2015, she spent three months recovering in hospital and her eating habits changed, affecting her both physically and mentally.

Her weight tipped over 18 stone and she struggled to keep up with her toddler.

She joined a local slimming group and started exercising, eventually losing a staggering eight stone in 16 months. Today she is running her first London Marathon - good luck!

Read more about Claire's story and why she is running for Centrepoint charity for the homeless.

Image source, Claire O'Hara

Don't forget you can watch all the racers come over the finish line by clicking on the link above which says 'Marathon Quad Split'.

Or you can click play at the top of the page to watch BBC One's coverage.

A man in a lobster costume is about to finish and there are thermidor jokes aplenty.

Lauren Tinsley

Scotland's Callum Hawkins collapsed during the men's marathon at the Commonwealth Games earlier this month, and the 25-year old has been talking about his recovery to BBC Sport.

"I took some extra time in Australia to recover, but everything is OK now," said the 25-year-old.

"I don’t remember feeling too hot at all, and I felt normal for that point in the marathon, but I do remember the legs going to jelly and then eventually falling and not being able to get back up. It was all blank from there.

"I think the athlete instinct is to keep going, especially when you're leading, and I was so desperate to win a medal. If someone had tried to stop me I would have told them where to go, but maybe I should have been pulled out like what happens in boxing."

Asked about his plans for the future, Hawkins said: "I have got some plans in process but I'm going to see how the legs come back and I'll probably take longer out than normal."

Image source, Getty Images

Think you can't run?

Surprise yourself - just because you don't doesn't mean you can't.

The Couch to 5k smartphone app is back.

BBC Get Inspired and Public Health England's One You campaign will get you off the couch and running in just nine weeks.