5500/230 = 23.91 Amps but with cooking appliances we apply 'diversity' because all loads will not be on at the same time.
23.91 - 10 x 0.3 + 10 = 14.17A
5A must be added if there is an integral socket in the cooker switch.
So, if there is then the mcb will have to be changed to a 20A - if...