Sorry this reply is a bit late, but i've only just joined this forum & seen your post.
I'm also in the UK but having owned the Leaf for just over a week, am certainly no expert.
This is the type of cable you need :-
https://www.ebay.co.uk/itm/334309288358 ... SwXZphkWbV
It plugs into the same port on the car as your home charger.
You should have another charge port to the left which is the CHAdeMO port for fast DC charging. The plug with cable for this port is fixed to the charging machine so your own cable isn't required for that.
Regarding the ZAP MAP, when you click on the map, there are filters on the left that you can set for your car & the types of charge port it has.
You'll probably only want CHAdeMO away from home for the fastest charge, usually around 30 minutes for a 70 - 80% charge.
Hope this helps, although it is a case of the blind leading the blind LOL.