Do what I do; Google it.

Mobile Welder London Mobile Metal Repairs - Weldfix

 

Thanks at SteveM for your suggestion.

I would prefer personal endorsements or recommendations - as a lot of the results on Google (like the one you shared) have mixed reviews. I'd prefer to use a company that came with a personal recommendation from a Jaguar owner.

 

Are you in the JEC?
Might be worth posting on their forum.