I've not had the 12k service, but the costs of my 6k service, that included changing the rear pads that I supplied, from my local independent, including vat were:
Oil - £23.94
Yamaha Oil Filter - £11.69
Diff Oil - £3.54
Washers - £1.20
3 Hours Labour - £151.20 (£42+vat per hour)
I asked him to spend as much time as he needed on it as it was the first time he had seen the bike (I think it may have been the first ever S10 he's seen). I use him for all my family's bikes as he is so good. All2wheelers in Poole, Dorset, I highly recommend them.