Can you still buy polystyrene ceiling tiles in the UK ?

B and Q are your best bet they're a large retailer and sell a lot. They also have a huge selection of tiles and things in their stores.

Ask at the store if they have some inflammable ones, also there is HomeBase, Wickes perhaps too.

I hope I helped.

Polystyrene Sheets B&q

Ceiling Tiles B&q

You can buy the coving from B&Q because I've bought some........

I just asked my ex who's a painter & decorator about the tiles, and he says he doesn't think they're sold anymore because they're a fire hazard, he hasn't put any up for years and he worked for the council so..........

Yes, from most B&Q of Wickes stores.

try b and qs or home base they do tiles that arnt inflammible but please ask first before you buy to be on safe side