I use Rohan Overlanders. They are pretty lightweight but warm enough when moving. 6 pockets that fit an OS map :-) They dry extremely quickly and you can give

I use Rohan Overlanders. They are pretty lightweight but warm enough when moving. 6 pockets that fit an OS map :-) They dry extremely quickly and you can give them a wash in tech wash to give them a bit dwr. I think they hit a good balance of fast drying and warm enough when moving. But if it's going to be very wet and you know it then some simple baselayer trousers with a brethable (read: air permeable, not just water vapour) shell trouser, preferably with braces, is the way I go. eVent is great but so is NeoShell I think it's called.