Induction hob and ovens supply

[TomDorset]

Looking for advise on how to best tackle this scenario. I have a single radial circuit on B63 MCB that used to feed very large Rangemaster cooper. Client want to split this into induction hob and dual oven but wanted to leave existing 10mm cable to avoid chasing walls. This 10mm cable is connected to isolator above the kitchen units. My plan is to replace it with small sub DB with RCD and two breakers to feed two separate radial circuit to induction and ovens. What donyou guys think?

 

[DefyG]

The 10mm (t&e?) should also be RCD protected if buried in wall anywhere on the route, so can you swap the 63A mcb for a RCBO and maybe a 45A would suffice? Then 2 mcbs in sub DB local to the appliances? Possibly wont meet the requirements for discrimination/coordination though.