Put it in to replace the rear wheel bearing as advised at recent MoT. I almost didn't bother, as it didn't seem that bad, but now it's done the ride is distinctly quieter and smoother, so yes it was that bad.
Took it to the all-makes independent that's convenient for work, who earned my trust over 5 years with the old Rover 75. The proprietor seemed to have insisted on taking it for the test drive, and was positively drooling over the 159 when I collected it: "it does drive well, doesn't it, and looks so good".
Hopefully that's it until May, when it'll be time for an oil service, the first change of cam belt and water pump, and a few other bits of TLC. I'm thinking Italia Speed near Newbury for that job.