@jonty I bought something vaguely related recently although a little less cursed. My car charges from a 13A plug (basically a built in extension lead) but I'd like to be able to use public chargers.
Your device would've also worked 

@jonty I bought something vaguely related recently although a little less cursed. My car charges from a 13A plug (basically a built in extension lead) but I'd like to be able to use public chargers.
Your device would've also worked 
