On 11/02/2018 18:48, Rob Morley wrote:

If you don't
have sufficient 13A outlets to supply your USB needs then fit some more
ordinary 13A sockets or use trailing power strips.


Nah that would involve chasing the wiring and redecorating. Having
trailing power strips about the place is a(n increased) trip hazard.
Much neater and easier just to replace the socket face plates with these
USB jobs (assuming they last a tad longer than the 18 months these ones
did).