Please does anyone know where I could purchase just a few metres of said
cable? I live in Hatfield, Hertfordshire.

I am in the trade, but found it very hard to buy a few metres of non-kink
flex. I found these guys in Bristol and bought 2 mteres off the reel of 3
core non-kink. i know you need 4 core, but they may be able to help, give
them a ring

DES 01752 661634

Cheers

Dave