Hi Roy, sometimes something so simple can affect a profoundly difficult situation. My brother has a similar symptom as the looking up at high places. He is also agoraphobic. This worked for him: a wide brimmed hat. I'm not kidding. It's not fool proof, but affords him a greater measure of mobility. If the brim of the hat obscures his vision of the height of a place, or the sky, he can manage not to look, and it seems that it is the looking that triggers him as opposed to simply the fact that the ceiling is high. I know it's a long shot, and sounds absurd, but there you go. Good luck, mate.