hello everyone

I have a question regarding wiring an electric oven (3.7KW). the hob
will be gas.

AFAIU, wiring it into an existing 30A ring circuit is out of the
question, since it already has microwave and a washing machine (2.2KW)
on it, as well as other appliances like TVs, kettles, computers etc (the
existing ring covers the whole floor).

so it looks like I have to use a new MCB and a new circuit for the oven
alone. the question is whether I should run a single piece of cable to
it or create another ring circuit that would have the oven and maybe a
microwave on it. is ring suitable for the oven and the microwave? how do
I fuse connections to this new ring?

another question is what thickness of cable I need to use. for a radial
circuit it probably has to be 4.0mm and for a ring 2.5mm should be enough?

4.0mm is not easy to come across (screwfix doesn't seem to stock it), so
it goes up to 6.0mm which is probably an overkill. the distance from the
CU to the oven is 10-15m.

thanks a lot in advance for any suggestions.

/ijon