I'm glad I put my armour on. 10W and tarnish26 show that it's not worth trying to find out why things happen in the way that they do - because they appear to be part of the problem. And while we are here, I do read NOTAMS and have a reasonable understanding from the AIP of what is possible - but reality appears to be different. But I don't think I'll pay a visit to Scottish because I know I'm not welcome. I know I'm only a customer/user so I 'm very sorry for rattling your chains. You guys have answered my questions brilliantly. Thank you - you have made another friend, you'll be next to Security on my Christmas card list.
PM