Machine shop Southampton/Winchester area?

BeardyAndy

I've a 1/2" pipe that I need shortening and re threading, I figured it was either M12x1.0 or 1/2"unf but it doesn't seem to be either and in the absence of any further tooling I think my best bet is to give it to someone that knows their onions (or thread pitch as the case may be!)

Any recommendations or fellow Fretboarder's that can help me out?