'Technically' you should be getting a sparky in to do it, but yes, a 30A 6kw hob (actually a 6kw hob will be 26A) and a 13A 3kw oven will be fine on a 6mm^2 feed with a 32A breaker (they will allow up to 15kw on a 32A/6mm feed combo according to the regs (unless they have changed, don't have a...