Well. I took the car over to Tony today and it appears the lower arm bush on the near-side has split. Makes sense to change both sides so that'll be done this week. I'm a bit miffed that this should have happened at such a low mileage. VeeKay has only done 130 000 miles - barely run-in
Mind you the price wasn't as painful as I'd thought it might be. Both sides replaced for £45