Hi Steve, and welcome to the club.
Finding a parts supplier in the UK must be easier than in the USA, and finding one that would ship out parts could prove difficult.
There is one company that is worth looking at and one I have used before for small parts.
Have a look at the David Manners Group who have a very good supply of new genuine Jaguar parts and who do ship abroad.
Let us know how you get on.
Regards,
Peter.