I went to plug my porty into a socket in a communal area, the socket looked like a normal 3 pin one but the middle top hole was a little smaller, hence my plug didn't fit.....Can you buy an adapter, are these common in apartment blocks.Thanks Donato.
I have one of these in one my regular communal area cleans, the top earth terminal is T shaped, as has already been said you can normally pick these up at an electrical shop.