Thanks Steve. Just looked more closely at my car and a 'spare' bumper and see that it applies to Rover 75 V8's too. All use the 'Premium' bumper and have the handed oval fogs, at least mine do, which are numbered XBJ105500 (RH) and XBJ105510 (LH), so same as are the facelifted FWD cars apparently. Stickered as "Valeo Belgium".
David