Roger Hayter wrote:

But if is going to wire in the hob directly without a plug he needs
either a 10A MCB, which probably woudln't be enough, or at most a 16A
MCB, which might well be bigger then the hob is rated for; a 13A fused
spur would be desirable.

What if I did use a plug and socket for the hob connection? That's what was
done (not by me) in my old kitchen.