Growing up in OZ we got both the UK and US stuff.
Some of my British Faves -
Hookjaw - 70s Jaws ripoff recently revived by Simon Spurrier in Titan books. Shark with a meathook stuck in its mouth dismembers every one in its way. It was an Action comics feature. Other characters included :
Kids Rule OK - Grange Hill meets Escape from New York - nearly all the adults die and youth gangs terrorise London. Look out for Lefty - a more larrikin version of Roy of the rovers. Plus there were others such as a Dirty Harry and Rocky type characters (featuring one of the first black British heroes). Wouldn't mind revivals of these (TV, movie , game)
Charley's war by Pat Mills and Joe Colquoun . Powerfully anti-war but still kicks ***. Long running series about a boy lying about his age to join WWI only to face many horrors ("they said it'd be safe! they liiieeed!!!")
Major Easy (nazi hunter). Art by Ezquerra
Darkie's Mob . Rough British officer and his troops vs. Japanese in Burma. Darkie is later revealed to be a half Japanese Buddhist!
Many of these are in nice Titan books HCs. Along with Johnny Red and Garth Ennis presents Battle!
and YOUR faves?