Hi all, I'm after a bit of advice please. Previously more of a runner, I've done a lot of half marathons but last year started ultra distance walks. This year I added a bit if running into the mix so for the first half of London to Brighton probably did 2:8 run:walk. Next year I'll do the Thames Path 100k which is obviously a good flat course. Ideally I'd like to aim for 17 hours or less which means more running! How do I make that transition? Make run segments longer or more frequent? Thanks in advance!