BS1363 pins to BS4573 shaver socket.
Note the unsleeved pins and the small compartment on the back for a BS646 cartridge fuse. Although the earth pin (top centre) is brass, it is not connected to anything.
The front states 'SHAVERS ONLY' and 'FUSED'. A fuse is necessary as the socket outlet this would plug into would typically be connected to a 30A fuse in the fusebox.
The fuse shown is incorrect - while this glass fuse fits, it is totally unsuitable, and woudl probably explode in the event of a fault.
The correct fuse would be a BS646 cartridge type, 1 Amp, which would have a ceramic body.