6.4 hob + 5.1 oven = 11.5 load. Normal cooking Diversity unless other considerations dictate (very rare) then total possible load = 11.5/230 =50 amps as 10 Amp plus 30% of 40 amps = 10 + 12 amps - 22 amps add 5amp if you planning to have a socket for occasional use of a kettle = 27 amps total. Well within the 32 amp circuit, could be run on 4.0 T&E cable but more commonly 6.0 T&E cable. Frees any rin or radial sockets circuits for other things. It is a pretty standard consideration