I *know* it says that, but they do have contacts suitable for a round pin connection, the moulding is shaped to accept them, and the Live Neutral shutter shutter opens with a UK 2 pin plug. Been using this type for quite a few years now.
FFS it's free delivery from CPC and costs all of 42p with the VAT
(or 1.60 for two of the other very similar design that I think is the one I have)
or 4 quid from Amazon for just one
I've even taken some photos to show the toothbrush charger plugged in