Reputable (i.e. good) welder & machinist in London / Essex?

[deserialisethis]

Hi PH collective,

Does anyone know of a good welder and machinist in the London / Essex area?

I've got a damaged cast ally part that needs welding and, potentially, some machining to ensure the flats and the ID of a bearing recess are maintained (post welding).

Any help appreciated.

P.S. Cross posting this in "Kent & Essex", Herts, Beds, Bucks & Cambs", and "London" sub-forums.