I use double-skin socks for walking and hiking. I got pomphlyx really badly for the first time last year and it’s not fully gone away (I suspect stress in my case is not helping). I did, however, manage to run a trail half-marathon in those socks with about 60 per cent of my feet still somewhat affected, so they were really helpful for me. I don’t know if you can get the Thyo brand in the UK very easily, but it’s these ones: