Just to irritate the British members on the board.. Do you think perhaps a BS version of CEE 7/5 could be used in the UK ? All that would be required for compatibility with ring circuits would be a fused socket.
There's been talk about this sort of thing on and off, but I think the IEE would put up huge resistance to moving away from BS1363.
If there were both fused and unfused versions available here (the latter for radials), then you can bet it wouldn't be long before people started using the unfused versions on ring circuits.