Fantastic question, I'm assuming that it's a single socket-outlet as most doubles have left and right handed switches on them.
Why would you want such a thing? Is there an obstruction preventing the operation of the switch?
Hi. interesting question which I had never realised was so !
Reason always on right hand side is not for righthanded people but because Live is on right hand side & since most outlets are single pole switched manufacturing easier with switch on same side.
Looking through many catalogues and nothing, sorry,
I know it doesn't help here as you want to be able to stop a transformer draining power but there is an option of a switchless socket (you could combine it with a remote switch if it's on a spur. I don't know if that would complie with part P though.