Daniel Wanjiru holds off Kenenisa Bekele to win men's race
Kenya's Mary Keitany breaks women-only world marathon record
Weir wins seventh London Marathon wheelchair race
Manuela Schar wins women's wheelchair race in course record
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Find links to highlights and the finish line at the top of this page
It's all change in the men's elite race.
The favourite Kenenisa Bekele was leading but, as the runners cross Tower Bridge and approach the 25k mark, he's slipped down the back.
He's dropped to the back of the group and he's fighting hard to regain his place. Kenya's Stephen Kibet is leading at the moment.
The moment the race got underway for today's 50,000 participants.
The Duke and Duchess of Cambridge and Prince Harry get the race underway.
The camera has just panned to Chappers in the middle of a sea of people. He's currently chatting away to a lifeguard.
It wasn't an easy start to his day, either...
#GetInspired
Earlier we introduced you to Jackie and Duncan who got married this morning on the Cutty Sark and will be running the marathon in their wedding outfits!
As they prepared to set off they told Gabby why they decided to do it...
Newly weds Jackie and Duncan run today's marathon in their wedding outfits.
You can track Duncan and Jackie, and any of today's runners, by clicking here., external
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Image source, .Mary Keitany is the first runner in the female elite field to reach the 30k mark. Yes, she's slowing, but what a performance this is so far. She ran the first 30k in 01:36:05.
Hot on her heels is Tirunesh Dibaba but she's more than 30 seconds behind. She's contsantly looking behind her, too. Can she keep solid and take advantage if Keitany tires?
Alyson Dixon is still leading the British contigent in 16th, with Jo Pavey 23rd.
Image source, ReutersIt will take more than a swarm of flies to stop Eastenders actor Adam Woodyatt (you might know him as Ian Beale) getting ready for this year's marathon.
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Here's how the women's race finished up:
GB's Jade Jones finished fifth in 01:51:46.
Image source, Reuters#GetInspired
Alice Boden: Good luck to Team Healy, who are running for The Honeypot Children's Charity!
Andrew Smith: Good luck to Alistair & Lauren Smith and Daniel Cunningham in their first London Marathon today. Running for Whizz Kidz. Proud of you. Mum & Dad.
Lyn Buck: Best of luck to Chris Whiskin today in his first marathon, running for Bliss. His little boy George was born very early and Bliss gave him and his wife Ami lots of support in those early days. Chris is now saying thank you by raising funds. Fingers crossed for a good time. Lyn and Dave xxxx
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"People keep on looking at me because they think I'm talking to myself!"
Baasit Siddiqui from Gogglebox has just past the five-mile mark and showing us what it's like to be right in the thick of the London Marathon:
Tweet us your support for him, and anyone that you know is running today, using the hashtag #GetInspired
The last of our runners have now crossed the start line, taking it as a leisurely pace - as is their right!
Hopefully the weather holds for them, with the sun just beginning to show through.
Women's elite race
Jo Pavey is hoping a good performance in London will help her secure a place in the British squad for August's World Championships.
If she finishes in the top two British runners, and inside the qualifying time of two hours and 36 minutes, she will be able to get a place in the squad.
Her marathon PB is two hours 28 minutes 24 seconds - which is seven-and-a-half minutes quicker than the required qualifying time.
"I've trained as hard as I could. I've had a bit more illness than I would have liked but any busy parent can relate to that and I've kept training consistently," she said.
She's currently in 24th place as we approach the 25k mark.
Image source, Getty ImagesThe runners will be really feeling it at 19 miles - shout loud, ladies!
In the women's wheelchair race it's Manuela Schar who is way ahead of the pack and she's coming home up the Mall now.
A brilliant moment for her and there's a huge smile on her face - her first victory in London, and she's done it in a course record time.
Image source, EPAMen's wheelchair race
Baroness Tanni Grey-Thompson
11-time Paralympic champion
That finish hasn’t been there for the last few years. Everyone wanted him to have a good race today.
For him, as much as anyone else, that’s a top win today. He ran a devastating race.
Well done, David Weir. I’m really proud of you
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One of my colleagues, Gary McKee, is a selfless person who is running 100 marathons in 100 days in remembrance of his father and in aid of Macmillan Cancer Support.
I am frightened to run a marathon, but Gary is running 100 of them, one a day for the last 99 days. His last marathon of the 100 is the London Marathon.
Paul Ferguson
An utterly remarkable effort.
Weir claims seventh London title
Here's the results:
Image source, ReutersMen's wheelchair racing
David Weir has done it! He's claimed his seventh London Marathon title, which is a record!
What an amazing sprint finish too to claim it. He kept his head down, he knew Marcel Hug was close behind him, but he kept his focus to cross the line first.
Well done, David Weir. The 2017 champion.
Here's the sprint finish and David Weir has made his move - he's speeding away, his arms going full speed, but Marcel Hug is close on him...
Men's wheelchair race
Baroness Tanni Grey-Thompson
11-time Paralympic champion
This is the biggest pack we’ve ever had for the men’s wheelchair race.
There’s still a few more turns to come. Everyone is getting a little bit nervous now.