So what I think happened is before they went to bed, the flatmates set every clock in the flat forward. So when my alarm went off at the correct time (I, also, did that 'setting them forward' thing), there was no clock I could find that actually showed the GMT time and thus confirm that the clocks actually had been set forward. So for a long time I had no idea if it was between 8-9 or 9-10.
Yes, I could have turned on the TV, but that would be no fun.
OK, work now.