Perhaps that's another change worth making then, just take the "very" out and then maybe consider what is meant by Welsh too.
Shouldn't Welsh pretty much mean all Welsh people living and playing for a band based in Wales rather than a band based in Wales that can and maybe does (I do not know if any did or do) pull its players from where ever it chooses? As far as I could see all the bands were based in South East Wales does that really represent Welsh Bands properly when non from the rest of Wales are there, or are only the good bands in the South East?
Basically yes. The only good bands in wales are in the south east. There's not very much in west or mid wales to my knowledge and the bands in North Wales aren't very good at all. Really there are only two great bands in Wales, Tredegar and Cory. Possibly The Lais I suppose, though they aren't really in the same league. All three of those are based in the south east of Wales. Any Welsh players who are any good and don't play for Cory or Tredegar could be labelled turn coats I suppose as rather than support their local bands, they go and play for better bands in the south west like Flowers.
If you were to eliminate the top bands from the band cymru contest, that would lead to the contest losing any sort of quality really. So really the college ensembles and local bands will just have to practice harder! Though it does seem a bit of an unfair advantage for Cory to enter a contest full of lesser bands, how could they ever lose...