Is this induction hob safe for me?
No, you MUST NOT run it on a 30A or 32A ring final circuit. 

The only things that can be connected to a ring final circuits are 13A sockets (single or double) or a 13A fused connection unit. Every connection or appliance on the ring must be protected by a max. 13A cartridge fuse to BS1362.


  Fixed loads fed by the ring must be locally protected by a fuse of
  rating no greater than 13 A or by a circuit breaker of maximum rating
  16 A.


https://www.tlc-direct.co.uk/Book/6.3.2.htm (this book does not cite the latest Edition of the Wiring Regs, but the stipulation is still in force). 

The safety of the ring circuit (where individual 'legs' are rated at 20A) relies on the load being spread more-or-less evenly around the ring. Putting a 30A load at one point could seriously overload the ring unevenly.

Regulation 433-02-04 of BS 7671 requires that the installed load is distributed around the ring such that no part of the cable exceeds its capacity. (That reference number may not be from the latest Edition of the Wiring Regs, but the stipulation is still in force).

At 7 kW, that appliance requires a dedicated 30A or 32A circuit from the fuseboard/consumer unit.

As you have a fuseboard that uses rewireable or cartridge fuses (at 30A for a ring final circuit fuse, rather than 32A for a MCB) it is unlikely that you have a RCD (residual current device, which protects against earth faults). Any new circuit must be protected by an RCD unless it is wired in steel conduit or cable incorporating a metallic shield. In domestic installations, this requirement usually indicates a fuseboard upgrade to a modern consumer unit is required.

The only way you can run that appliance from a ring circuit through a fused connection unit (FCU) is if there is an installer settings menu that will limit the maximum total load to less than 3 kW.