It's because we pronounce hour as "our". So my mind tells me that the word begins with a vowel and it doesn't.
Oh, right. But that silent H is still an exception in English, although maybe it explains the Cockney accent where H is ignored, as in 'allo, 'ow, 'eaven, etc.
I'd have to agree with that Aileen - but once you live in the area for a period of time, you get the hang of it. However, town Doric (Aberdeen) and country Doric are two different things, and while I understand both, I definitely can't articulate either ...
Didn't know there were distinct variations. I've only ever been in that part of the world on holiday and sometimes felt that I needed an interpreter - like the time I asked a bus driver if his bus went to a certain place. I got a lengthy response, not a word of which I understood, so I just got on the bus in blind faith, and fortunately got safely to my destination!