Yes you're right a merry can muslim, the further away from the equator you go the more the daylight hours change throughout the year. However, I was using the UK as an example.
Interesting to know that the fasting time is so much longer than the visible-sun time. I thought it was all about when the sun appeared and disappeared. Oh well, every day's a school day!

Qatari - good point about being busy, but I certainly wouldn't trust myself driving if I hadn't eaten or drunk anything for several hours! And as for the spiritual thing, I obviously wouldn't have that advantage (and will never understand it either, but that's not for discussion here!)