Gen 3 (2018) 8,000 mile service plus MOT was ?350. I had my old HP4 have everything done (this time last year) I think it's called the 30,000km service including valves etc. ?900 incl vat. Just tell them don't do any electronics upgrades if you have had it tweaked because they can't save the settings before hand so can't back out any "upgrades"