Thanks everyone for your assistance. Here is the next installment in the story...

Thanks for your comments, Pallox. I've been having a look inside this evening and I've found a bent switch. Well, I think it is. Please see this link (including photos)...
http://www.vintage-radio.net/forum/showthread.php?t=83395

I´ve got one of these too. Didn´t spin at all at first until i opened it up and examined the motor unit... All i had to do was to replace the thick hard dried up grease in it to make it spin again. It has ball-bearings as well that should be cleaned up and re-oiled. Wouldn´t say it is very difficult but it probably shouldn´t be ones first attempt as a handyman.. While at it, change it´s belt as well...

Thanks, everyone. Yes, that would be a concern, james :-(

I was going to suggest the motor was possibly faulty. It may well be that it used a fairly standard PLL motor controller - or at least that one could take the motor assembly out of another turntable, but then, you'd not have a B&O ....

Maybe have a look at this Simon... might help.

http://www.hifi-manuals.com/Download/Bang-and-Olufsen/Beogram-1200-service-manual

I know the 1200 had a tapered "idler" pulley, which the belt might have ridden off of >