Best practice installing Neff electric hob & single oven

[nettie2006]

I have a Neff single oven (2.8kW) and electric hob (7kW) to install (was to be a gas hob so no planning was done)

There is a cooker switch with 13A socket on the wall but no apparent further terminal box. The kitchen currently has a freestanding gas cooker with no electric connections. The switch is apparently connected to the consumer unit with a 30A fuse. (max load 63A currently full with 2 x 5A & 2x30 ccts (cooker and sockets))

The hob has a cable attached (which according to the manual is Y type with no user service). 2 cables 6x1.5mm2 plus earth

The oven has standard terminal connections.

I also need to install a 120W extractor fan.

question 1

Can I spur both the Hob and the cooker from the same terminal box?

Question 2

If so, could I do this without installing a terminal box?

question 3

What size cable should I use?

With the cable on the hob being approx 10mm2 and the total power being 9.8Kw, I reckon the hob would take the whole 30A cct and I would need another 13A cct for the oven.

Could the fan and hob be run from the cooker cct (changing out the switch for one without a 13 A socket) AND I run the oven from the 13A socket cct?

Or could you suggest other options?

I may just bite the bullet and install the gas hob I have instead.

Thanks