Service costs

10k isn't a regular service , I don't think. So just an annual service I guess, 12000 is the big one and can cost upwards of £500 depending where you are. Look here for schedules

 

as a Guide...

http://www.destinationtriumph.co.uk/servicing/fixed-price-servicing/

But also try http://www.muddysump.com/ He is a mobile mechanic and have heard good things about him on this forum

 

Or you can ask Clive Wood. Hinckley Triumph owners club specialist of the year.
Facebook
https://m.facebook.com/Clive-Wood-Triumph-824782640921802/
Or 07752477738