Thanks Eric, so 4mm cable off a 32A MCB radial, or 2.5mm cable ring main. I will do the 'labouring' part and my tame sparks will do the connection/check for me.
First thanks for adding me to your forum. My experience with electrics is limited to rewiring my first house with guidance from my electrician father 40 years ago. Unfortunately he has a big contract for the big guy upstairs so I'm grateful for this forum to ask. In think I have found the answer to ...