Hey Smokey! Late to the party but as other members have suggested. An indica (or indica leaning hybrid) with a decent level of THC% should do the trick. I haven't been checking vendors stock but I'm pretty sure DIUK have some Grandaddy Purp that looks nice and also Birthday/Wedding Cake, which is a personal favourite and always packs a punch. I think TGT have some Gelato which is also a heavy hitter, though a tad expensive. I think RB has some GelatoDawg as well but not sure how active they are at the moment and haven't seen any reviews. Stardawg is always an old reliable or some Gorilla Glue.
Hope this helps mate and happy blazing/sleeping lol!