Pretty low key event over here. had to search a bit on bbc to find it.
Finishing in the top two at Kew is half the deal, but athletes also have to duck inside the Olympic qualifying times. They can do this on the day or have run the required time at any point from January 2019 onwards.
The men's qualifying time is 2:11:30. The women's is 2:29:30. In the 20km walk, the men need 1:21:00 and the women require 1:31:00.
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Marathon begins at Kew Palace and finishes at Palm House
Natasha Cockram, best-placed Briton in last year's London Marathon competes in women's event
Wales' Dewi Griffiths fastest man in men's field
Callum Wilkinson and Tom Bosworth automatically qualify for Tokyo in the 20km race walk trial earlier
I have bolded the best bit, so that our cousins think we are really thick.