Now I am a little confused.

The appliance that the 'electrician' plugged directly into the bottom 2 holes was a tumble dryer. Surely this is a high wattage appliance that needs earthing?

The appliance that I would like to plug directly into the bottom 2 holes is a small fan heater. It's 2000w but only has 2 pins but no metal strips at the side.

I have lots of different sorts of adapters, how do you tell which ones are grounded?

(Hope you dont invoice me for this :)