Right, yes. Left, no. Its knackered. Pulled the surround up and there is a piece of the spring rolling around underneath! So that's probably the bagginess sorted.

Is it easy just to remove the shifter by undoing the three or so screws, whipping it out and changing it?

Thanks for the prompt replies. I've turned off notifications, so didn't realise anyone had, and this is the only forum out of four that actually did. So thanks again!