cable calculation

I'll get an electrician in to do the connections but need some advice on laying the cable as it's a 15-metre run from the supply box to where the ovens and hob are located. I guess it could take days to lay the cable! Currently, there's gas only in the kitchen. What size cable, 6 mm or 10 mm...

Hello, I am getting a bit bogged down with detail as I always try my best to meet every best practice but I am very out of practice as I have been working outside the industry for 15yrs. All help appreciated. I am refurbishing my small 2 bed bungalow and have some questions for all the...