Or an LED night lite designed to fit a shaver socket.
(Amazon.com product link shortened)
It seems increasingly common for shaver chargers in the UK to be of the continental plug variety which is a rattling good fit in UK 2 pin socket adaptors (and tends to fall out). The dual fit ones tend to have slightly flexible plastic pins with conductor only at the ends.
There is some slight difference in spacing/diameter but in practice they always seemed to work for me OK in Belgian household sockets.
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