@tumutanzi, we had some of these on the TV a few years ago, they were made for a different voltage and someone was bring them in to the country and changing the plugs, there was some house fires because of them. We nearly bought one but with seeing this on the TV it really put us off, so we have a normal fan at the moment.
It is a pity, the plugs caused those house fires...
It's never good mate tbh, There was issues with iphone chargers as well, they did a documentary on the BBC about how these chargers were coming on to the market and they were not meant for the british power watts so it was causing the plugs to explode. now everyone has had an Iphone at some point so it could have been so dangerous.
Trading standards took loads of them off the market and tested them, and the ones that cost £1.00 to buy were the ones that had the fire risk problems.
So buy the right stuff, and use them well. Good luck.