Interesting.
I thought that was quite a reasonable quote compared to what I got from the Sidcup dealer!
Sidcup quoted me 50K service for £461 incl VAT, parts & labour, and for the 60K, they wanted £948 incl VAT, parts & labour!!!
Canterbury quoted as follows (all inc VAT, parts & labour):
40K - £568.32
50K - £339
60K - £878.26
70K - £339
80K - 568.32
90K - £339
So just between the two dealers I made enquiries with, it's £122 cheaper for the 50K service, and £70 cheaper for the 60K service.
Sounds like you got some good prices when you did your services.
Trouble is it's not worth a day of my wages to get it to somewhere miles away (especially with petrol on top).