What fishman said

Hand guns are now totally illegal - even most gun clubs can't have them. After some nutjob walked into a school here and shot a bunch of kids that sealed the deal on hand guns.

Farmers and gamekeepers can have shotguns/rifles but that's about it. You can't really buy them for hunting in the UK afaik.

Only special police units carry firearms and for the most part its the HK MP5 but armed responce carry all-sorts of kit.