2 single ovens and an induction hob?

With cooking appliances you'll definitely get scenarios where most of the load could be drawn simultaneously, even if it's only christmas day or some dinner party, you'll find someone won't be too happy if their MCB trips in the middle of some complicated dish.

We have ours on 2 x 32A circuits.

Decades ago most cookers were also single appliances and had their loads fairly tightly calculated to be within the range of a single classic “cooker circuit”.

Very large cookers like the wider “stove” type devices often sat on a 45amp circuit

They were designed as single units though and the manufacturers managed the overall max load.

Some even had interlocks to prevent certain very high draw combinations being selected. Actually, most hobs will prevent you exceeding the maximum ratings as they will turn down the output on other zones if you apply boost etc

These days cooking appliances are much more diverse and the vast majority of kitchens, certainly since the 1990s use separate ovens and hobs.

Ovens now often have self clean options and quite high consumption rapid heat modes and induction hobs have very high consumption boost modes.

Over all these appliances are more efficient - ovens are much better thermally insulated for example and induction hobs manage to get more heat into the pots and less into the air / wasted through thermal radiation, but they are all far more likely to have big initial power needs during rapid heating cycles.

There also needs to be consideration given for the fact that kitchens may see new appliances go in with some of those functions in the future.

To me running one circuit to a kitchen for those is just asking for inconvenience for the sake of saving a relatively minor bit of work. The wiring will in all likelihood follow the same route back to the distribution board and it’s also practical to be able to isolate the ovens and hob separately.

I know we had a situation where someone applied that diversity concept to our old utility room, which contained a dryer, washing machine and dishwasher.

We replaced a washing machine with a Miele which must have had a bigger element and it resulted in the breaker tripping if the washing machine and dishwasher both hit heating cycles at the same time.

Overall both newer appliances were much more efficient than their predecessors - less water and power used but they both were capable of pulling a lot more energy for brief periods as they ran through their programmes.

The other aspect is these are all continental designs and they will be assumed to be installed on separate radials to the manufacturer spec. Ireland and the U.K. are both outliers on this by not doing so.