Easy to fit as you remove the headlamp, think the size is HB 3 9005 55w, but I think someone else should be able to confirm. Dip and main beam take the same bulbs. Sidelights are a 501, I think 5w.
Defo HB3
Remove the grill, undo the two Torx/10mm, depending if theyve been replaced, twist the latch to unlock, and "persuade" them out off the lock tab!
They've certainly come down in price in the last year. Were twice that when I was deciding whether to buy some. Although on a second look, I'm sure the ones I saw previously were actually branded Diadem.