Long story short I was on holiday and stomping about for hours at a time and as has happened many times before I've gotten chafed to within an inch of my life. Think straddling a pommel horse made of sandpaper and you're not far wrong.
I've realised like a bolt from above that in my 30s and with a reasonable job I can fix this problem, but I'm hoping for some guidance from people with good experiences so that I don't have to go through too many pairs before I find the one.
So yeah, something that's good for walking, something that's good for regular use. Advice welcome and thanks!