When I posted this topic, I hoped I might get a couple of usable replies. Instead, what do I get but an embarrassment of riches. Sound, detailed, useful information. When my time comes to commence hours-building, I shall prefer somewhere at least slightly challenging and Welshpool sounds more attractive than ever. Very many thanks to one and all.
C'mon Puss. Let's get the 'stick' airborne. We'll go and scatter spells over Slough.