Power transformers

[Ricesnaps]

Just had a bit of kit arrive from Hong Kong. However, the power transformer / plug has two flat pins on it.

The transformer states:

input: 100-240VAC, 50/60Hz 0.2A
output: 5.8Vm 500mA

Plugged it into the bathroom razor socket (it fits the 115V socket) and all seems to work fine and dandy!

Do I just need to buy a standard 13amp razor adaptor? Will this fitting fit my power supply and will it matter that it's in a 240V supply, not a 115V?

[spin mobile disco]

Sounds like a variable transformer you should be fine with an adapter thats why it says 100 - 240 vac . All it means is that the primary coil will take 100 - 240 volts to provide correct output on secondary coil.
Failing that go down to maplins and buy a UK fitting power adapter 500ma is a very easy load to match.