Hello Joe,
I wouldn’t be concerned about timing chain wear at 42K. At 100k -? and then the tensioner.
Your annual mileage is around 15k? If so, I take it you don’t do much short trip mileage -?
Servicing :- main dealer? Yes, you could go to the Longlife schedule, and some owners would probably say that would be fine. Me, I’m old school, and favour an oil change at around 10k, but it really depends on your longer term ownership plans. If you intend to change it in the next 3 years, then Longlife might be the way to go. If you are keeping it for longer, then it’s worth thinking about retaining your 10k change schedule.
Kind regards,
Gareth.
p.s. Do you ‘use’ the stop/start? If so, beware that this significantly increases the stress on chains and belts, and other components. I guess you will gather that I’m very much averse to this system!