Apparently it's normal, in Germany, to have multiple phases to domestic properties? 🤔 Indeed, your oven will expect 2/3 phase.
Is the UK weird in having high-current single phase as the norm?
(3-phase in homes becomes more common as people install car chargers etc.)
@hugh had the joy when moving into the current place that the old hob only expected 2 phases, but the new induction one wanted 3
only 2 phases were wired to the hob, had to run a new phase