I've previously put a 16A rated oven on a 13A plug (and fuse) and it ran without any problems for years.
Not attempting any of that on a 7.4kW hob, but I got lucky getting a badly listed but brand new £900 Bosch hob for £200 on eBay so I'll store it for now.
I think that's pretty common now. My new hob is 7.35KW and a lot of the others I looked at were. On mine a "ring" can draw 3.2KW on boost so hitting that suddenly becomes not that outrageous.
I've previously put a 16A rated oven on a 13A plug (and fuse) and it ran without any problems for years.
Not attempting any of that on a 7.4kW hob, but I got lucky getting a badly listed but brand new £900 Bosch hob for £200 on eBay so I'll store it for now.