All appliances should not only have isolators but they should also be accessible without removing the appliance.
Presumably the new circuit runs back to the consumer unit and has its own MCB? Induction hobs are, typically, 5-6kW loads so you would be looking at a 32A MCB and a 6mm feed.
It's a notifiable job (kitchen) so you should have a certificate and so should Building Control but two of thirds of electricians are not self-certifying...
...on the other hand is your consumer unit 17th Edition? That's dual-RCD basically. If not, even some self-certifying electricians won't issue a certificate if the new circuit is on the non-RCD side of the consumer unit for example.