Last time I ordered vits and UV tubes (that sort of stuff!), I used reptilekeeping.net but, they've had a holding page on the site for ages, hope it comes back! Have also used these before:
Triple 8 Reptiles - Online Reptile Shop UK
Live food, I use these two - depending on what I need/want and quantities/availability:
livefoods home - crickets, mealworms, insects, and frozen foods for reptiles
Ricks Livefood - Crickets, Locusts, Roaches*-*Ricks Livefood - Crickets, Locusts, Roaches
Mice, I've nothing for outside of the north-west, sorry.