Welders in Chesterfield/sheffield area?

I`ve got an Alfa 75 Veloce which needs work. To cut a long story short, the garage who I had paid upfront to do the work (Ital Autos) has folded. I`ve managed to get the car back, but the work has only been started. A pair of sills have been welded into place, but it still needs both rear arches, boot floor and a couple of patches on the floor doing.

Does anyone on here know anyone trustworthy I can use? I`m in no rush, so no problem if it takes someone a month or two in their spare time.

PM me or reply here if you know anyone.

Cheers.