Had to do this twice now, once on each side!! Halfords don't always want to know and the instructions in the hand book are pretty poor, But with a vanity mirror, torch, a spare pair of hands ( and a hat to stop you banging your head on the bonnet catch) it can be done. The trick is to be able to see the damn spring in the mirror so that when you then go in 'blind' you know what your doing and it can be easily 'pinged off'. Once bulb is replaced then replace the rubber, then refix the electric plug connector.
Aidan Harrison, November 2008