Pot with three cacti

Hywel is the Cacti King... :o)

lol TT :D
I'd repot these into separate pots. The one with flat pads is Opuntia microdasy I believe, and it requires more moisture than the others.
I'd put them in clay pots with gritty compost. Give a good drenching and then keep dryish for the winter in a cool but frost free place. The Opuntia will need watering more frequently, but always let the compost dry out first.

Thank you very much Hywel, I thought you would be the man to know. :~)))

I'm glad to be of help, although I don't know much. I've only been growing them since 1964 ;o)

Lol, well I'll stand by my decision then! Lol :~)))