You should also check out Neil Marshall’s other Brit-Horror Dog Soldiers.

A squad of British soldiers on exercises in the highlands of Scotland get ambushed by Werewolves and whilst there is a little more action than The Descent it still holds up thanks to great performances from the lead actors (Notably the banter between Kevin McKidd and Liam Cunningham), an emphasis on practical effects and characters you genuinely care about.

Brit-Horror was something of a mini-thing at the turn of the century. I’ll assume all readers have seen 28 Days Later but check out WW1 B-Movie Deathwatch which depicts the tense scenario of a group of British soldiers coming our of the literal fog of war and stumbling onto a remote outpost of Germans. Jamie Bell and Andy Serkis star.