Sorry, only just seen your post but if you're still wondering I had mine done in July just before the prices all went up and it cost me £516 inc VAT and including the MOT!
Main costs are -
£59.80 -Ineo 5W-30 Fully Synthetic oil
£105.44 - 4 Spark plugs (vehicle only has 10,262 miles on clock - bloody ridiculous to change them)
£60 - Oil, Air and Pollen filters
£147 - Labour
£45 - MOT
All plus VAT
There was also some rubber seal @ £12.86 - don't know what that was for.
My warranty runs out next July - if I keep it I will have it serviced by a local independent one man band whom I know is conscientious and reliable so should get a better job at less cost! Alternatively I may swap it out for something else - trouble is, what?