RE: Charging via UK Socket
I believe that things are maybe the opposite way around from the way you think. The Zoe comes with a cable designed to connect to a wall box, it does not come with the kind of cable you can plug into a regular household socket (though I believe you can buy one of these at extra cost for 'occasional use').
I've written about charging here (but Renault haven't provided a lot of detail):
My comments on the 'occasional' cable are based on complaints on the French forum (http://renault-zoe.forumpro.fr/
), where they think the cable should be included for free.