the thing is, Scotland and Ireland are very close together, like England and France. Mutual visibilty no problem.England and Ireland is trickier: Black Combe and Slieve Donard(Mourne) are th logical contenders, but the Isle of Man seems to have inconveniently interposed itself. I reckon Scafell/Slieve Donard are the likeliest contenders. McGrath's idea for a TV programme is great, but unfortunately I would guess that,even if it is theoretically possible, it's only likely to be clear enough a day or two a year. However, a TV prog from Snaefell summit on the Isle of Man with pail, Oddie, Aly Bain and Johnny Rotten would be more feasible: it is quite often possible to see England,Wales, Scotland and Ireland from Man, as they are all quite close.
    In the literature I have read, I have only ever seen the claim made for Black Combe, and no reciprocal claim made for teh Mountains of Mourne. That is what leads me to think it is impossible. But I'd love to be proved wrong. For the moment, I shall have to be content with JOhn from Hull's boxers.