Another vote for G-Shocks here. I’ve had two that have lasted about ten years so far. They’ve been banged, dropped, thrown, drowned and never had a problem. At around £50 for a basic model, they are terrific value for money. Just the thing for a wet and windy battlecamp.
+1 on the resin strap issue.Timex Ironman.
Cheaper than a g shock, tough as old boots, decent strap. Buttons big enough to use with gloves. Pick em up for 30-40 quid.
I find resin straps are a common point of failure, so make sure it's not too flimsy. You can, of course, add a decent g10 type later.
Some peeps pack a cheap spare watch
Like the casiof91w @fraudstar was on about and stick that under the daysack lid. Something to fall back on when you discover the last section attack left your watch behind. Only a tenner or thereabouts.
Just don't set the alarm on them or it will embarrass you.