I can't be certain, as it's nearly a year since I last stayed here, but I'm fairly sure there was a universal power pin adapter (note - not voltage) on the desk in a little bag. Also there was a note about how much it'd cost if you chose to take it home with you!

Failing that, ask at reception - pretty much all decent hotels will lend you a plug adapter. Note though that you'll need a device that's happy with 240v, just because you can get the plug into the socket doesn't mean your thing will be happy with the electricity coming out... (Most modern computer / phone / etc adapters will do 100-250v input, but do double check before plugging in!)