I'll be going with my new (to me) Altberg brown boots, some kind of plain tan or grey combats, a thigh length mid brown muslim shirt, dark brown long Afghan waistcoat, black & white shemagh, tan or grey pakol hat, Soviet belt & Y-strap w/ ammo pouches for AK or SVD depending on which primary weapon I'm carrying at the time, and various other pouches for grenades, IED components, sweets, etc.
I'll also be taking some goretex kecks, probably DDPM because I can't wear the DPM or black pairs I already have, and possibly a tropentarn poncho if I can find one at a sensible price, because the last ones sfrankish had on fleabay went a few weeks ago. Basically I intend to be prepared for the Welsh weather, which is notoriously fickle. I expect that the heavier my rain gear turns out to be and the further I have to walk carrying it, not only the less chance of rain there will be, but also the hotter it will be... but by the same token, if I don't bother, it will be high winds and piss down, sleet, and hail morning noon and night!
I think I may hide a 2L hydro pouch under the waistcoat as well... and, depending on my g/f's attitude come the time, grow a tactical chin guard.