Thanks all! Yes, I tried Googling (and even the CAA website) - but had only limited success.
So my strategy:
1) stay with the PPL as long as the health lasts - let's be honest, the GA demographic makes that a factor ;-)
2) Bag the minimum hours in a PA28 to maintain currency. Expensive, but hardly a chore.
3) Save up for an Ikarus for fair-weather bimbling.
4) Meanwhile, look for a share of anything, anywhere in central Scotland. Shares really don't seem to come up very often.
5) Move to Gloucester or Blackbushe. I get green eyes looking at all the shares going in UKGA news, down south.