Mercian head tube problem

teenslain Also, are Mercian more likely to repair something like that (whack some brass in and ream it out again) or stick a whole new head tube and lugs on?
Any tips greatly appreciated, I'm desperate to start ridin' her...

Only one way to find out. Speak to them. They may offer both depding on you budget. I would think an entire new head tube as brass is goos as filler material when brazing but is too soft (I would have thought) to just use to correct an ovalised head tube.