Postpublished at 08:54 British Summer Time 22 April 2018
Ready for the first race of the day?
The men and women's wheelchair athletes are on the start line ready to go.
Watch live on BBC One and at the top of this page.
Eliud Kipchoge win's men's elite race - Mo Farah third
Farah breaks British marathon record
Vivian Cheruiyot of Kenya wins women's elite race
David Weir wins men's elite wheelchair race
Madison de Rozario wins women's elite wheelchair race
Officially the hottest London Marathon ever
Caroline Chapman, Kal Sajad and Matthew Henry
Ready for the first race of the day?
The men and women's wheelchair athletes are on the start line ready to go.
Watch live on BBC One and at the top of this page.
Record breakers, strange facts, The Great British Bake Off and 40,000 red apples.... this is the London Marathon 2018 fact or fiction quiz!
World Para Athletics Marathon World Cup races (from 08:55 BST)
It's almost time for the wheelchair and World Para Athletics Marathon World Cup races to start.
There are eight events to look out for:
The T51/52 and T53/54 wheelchair races will start at 08:55 with the other World Cup events starting at 09:00 BST.
#getinspired or text 81111
Kate: I love watching the marathon. So many inspirational people going for it for causes close to their hearts or for reasons private to them. To every one of you - SMASH IT!!!!
Marilyn: Thousands of ordinary people doing something totally extraordinary today. Good luck to everyone running today’s London Marathon
Jessica: Ready to get inspired once again. I’d love to one day be able to cross that start and finish line. To everyone taking part, you are amazing and incredible people, and I’m completely in awe of you all!
London Marathon 2018
#getinspired
Is this your first marathon?
Or maybe you're thinking of going out for a run, but have never really done it before.
Radio 1’s Adele Roberts and Newsbeat’s Ben Mundy have some tips for first-time runners.
#getinspired
Do you want to wish someone good luck?
Have you had a selfie with the man who's running with a fridge on his back?
Have you spent hours crafting a good luck sign with glitter pen?
Have you been inspired to put down that bacon sandwich and go out for a run this morning?
We want to see your London Marathon photos, messages and comments.
Get in touch on Twitter via #getinspired, external.
#getinspired
Don't forget, the Mini London Marathon is also taking place this morning and it's about to get under way.
The race will consist of the last three miles of the main marathon route featuring runners in age groups from 17 and under. Starting in Old Billingsgate, the route will end at finish line on The Mall.
And here is Mo Farah giving some advice to some of those taking part ...
All times BST
BBC One's coverage is starting right now. You can watch by clicking the play button at the top of this page.
Here's how you can follow the races for the rest of the day:
08:30-14:00: Live coverage on BBC One and online
08:50-12:25: Elite race coverage on BBC Red Button, Connected TV and online
12:30-16:00: On the finish line, via Red Button, Connected TV and online
18:00-19:00: Highlights, BBC Two, iPlayer and BBC Sport website.
London Marathon 2018
After the longest winter in history (or so it seemed) the summer is finally on its way.
Unfortunately, it's decided to pop up right on cue for the London Marathon.
Today's race is expected to be the hottest ever run, with temperatures predicted to reach 23C.
The previous warmest races in the capital were in 1996 and 2007, when the highs of 22.2C were recorded.
Organisers have added extra water supplies and will deploy six run-through showers to cool runners.
"We have numerous contingencies. Listen to your body, change your race plan," said race director Hugh Brasher.
London Marathon 2018
Welcome to live coverage of the 2018 London Marathon!
The first race gets under way very soon so here's what to expect...
London Marathon 2018
More than 40,000 athletes...
...with more than 40,000 reasons to run 26.2 miles around London.
Prepare yourselves, it's going to be emotional.