Cheers
@jamesinc
@Angus242164 Yep, exactly. The centre cap is a pressure fit into the hub cap, pushes the clips against the ridged edge of the hub.
Kind of a shame they're designed that way because it seems to make them fall off, which happened to me the other day. No idea where unfortunately.
I don't think the earlier style will fit, but i'll have a hunt around to see if I can confirm it. I'll let you guys know if I do want some of these instead.
Cheers for all of your replies :)