Was definitely British gear, so it would have been a Lee Enfield. They also used Brens and Stens, of course.
When I was at the Imperial War Museum years ago, they had a mannequin dressed in paratroop kit. Interestingly, I recognized the jacket(smock?) as one like my dad was wearing in a pic taken c1946 while on occupation duty in Germany.
As an aside, the pic showed what happened when they smuggled out their firearms and went deer hunting on an ex-Nazi game preserve. Not too sporting- the bambis didn't have much of a chance up against Stens, Brens, and Enfields. They ended up being donated to a refugee camp.
He was a bit rueful telling me the story- this when he was in his 80s- but there was still a bit of a twinkle in his eye as he told it.