A useful link, thank you jcb986. It looks like replacing the spark plugs may be a good idea (although they seem to be running perfectly), I should also add the Polyrib belt condition, coolant hoses condition, to my already rather large checklist. I feel the need for some comparative quotes to be asked for here in the UK.
Does anyone have any advice about leaving the next service until 35,000 miles, as it was done 12 months ago at 26,000 miles?
Does anyone have any advice about checks I should ask to be made for RMS failure and IMS failure?
Thanks!