On Jun 15, 3:22*am, terry wrote:
That's
around 37 amps!!!!
So if a 50 amp breaker then needed, to avoid trip outs,

Not sure I understand this bit. A 40A breaker will run a 40A load
indefinitely without tripping.

I don't think there is an issue with the breaker rating but the cable
would certainly under rated at 4mm according to UK regs.