Help - where’s the flattest park in London?

Rick’s pledged a 5k pb, now he just has to go and run it… There's still time to join The Running Channel's Pledge a PB campaign this January. Commit to a 5k target time, run it by the end of Feb and be in with a chance of winning some huge prizes. Find out more: https://therunningchannel.com/pledge-a-pb/