Well... the L85 is the standard personnel rifle inside the British tanks (exactly how do they cram the rifles or yank them out whenever the tank goes balls-to-the-wall in that tiny space in the Challenger 2's turret?).
IIRC, the L22A2 carbine (about 200mm/8" shorter than the L85A2) has been issued to Royal Armoured Corps armor crews as well as helicopter crews, although I don't know in what kinds of numbers.