Thanks again Cossack. It's more for the teaching aspect, so that I'm telling people the right thing; as you can see it's a subject fraught with misconceptions. I could always go IFR myself but I must admit to being a bit lazy so probably would do one of the above instead. Anyway, hopefully you won't get too many Tayside aircraft getting it wrong now (unless it's me making a hash of things).
Cheers DB6