My L405 TDV6 (Vogue SE) will be due its first service in a couple of months. Obviously will get it serving at a main dealer, but I have no idea what sort of price I should be looking at.

Do prices vary from dealer to dealer? Are you better to take your own oil to reduce costs? I did that with a DB9 a couple of years ago and it reduced the price considerably.

Car will have done c6000 miles; hasn't missed a beat so far. Gone:
11 Cayenne T
09 DB9
58 911 T
57 RRS SC
57 XKR
Alfa Brera