You'd be better asking in teh Electrics Uk section - I think you can ask a Moderator to move it but I can't remember how to do that.
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you use the "report" link below
Mod
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That really depends on the supply and cabling behind it.
IF the cabling is up to it, and the supply breaker/fuse is adequate, then yes. But you have to check that first.
For example, if the cable is 4 or 6mm² and fed with a 30A fuse or 32A breaker - yes. If it's a 2.5mm² cable with a 20A breaker - then no, your 30A hob will trip the breaker. But you need to determine the size of the supply cable, the installation method, then you can check its current rating and what supply fuse/breaker ratings can be used with it.
However, my limited experience with induction hobs often have the ability to set a maximum load on the supply. I assume that you can use some of the rings up to max power - but if you try and use all of them together then it'll scale back the power on all of them to limit what it draws from the supply. By setting this properly, you could use a 13A plug - but that's not ideal, you would be better checking to see if you can direct connect it.