It turns out that my guess of 100VA was a bit old fashioned.  This thing was rated a mere 20VA (20W).  Not that it matters much, because it's now rated 0VA because the thermal fuse has failed.  Most likely because of a high load being plugged into the outlet.

These shaver sockets are used in the UK to provide a transformer isolated 115/230V supply for safer use of things like shavers, and recharging things like toothbrushes and lady-toys.

This unit was sent for our exploration by Thomas Nagy:-
https://www.youtube.com/c/thomasnagy

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