DH is of the opinion that both appliances should be separate. The hob would work on 13 amps, but probably not if you've got all four rings on at the same time. As for the oven, its just not right. There's no way it should be on anything less than 30amp. He also doesn't think you need a part p, thats usually only for new builds, not just kitchen refits. Hope thats helped a bit.