Those shaver sockets give out around 280 volts on low load (charging a toothbrush) which I think is too much. If the toothbrush is rated 100 to 250 volts use the 110 volt socket which is usually around 135v on low load. But you need to ensure the unit you choose will allow a UK shaver plug to go into the 110v socket (not MK or the one you pictured in post 3).
A standard ( ie 30 mA ) RCD will not trip on a 10 mA leak through body to ground. If that 10 mA current passes across the heart then the person could die without the RCD tripping.
True (although fortunately not common), but electricity does not know whether it is in a bathroom or anywhere else, so are you suggesting that it's not worth having 30mA RCDs protecting any circuits?
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