Is it a "cooker" where the hob is part of the same appliance as the oven, or is it two separate appliances?
Have you got a digital camera, and can you put up a picture
(or if not, a description) of:
The hob
The oven
the makers rating plate which you will find either round the back near the wires, or inside the oven door.
It will say things like
-220/250v
-50Hz
-5kW
-5000W
-25Amps
-Moffat cookers Ltd
-Indesit SA
-Approval No 1234
-Model IM954
-Made in Thailand
-Date of Manufacture Feb 1953
It is usually a silvery metal plate, rivetted on, with a combination of printed, engraved and stamped numbers on it
Also:
The Cooker Switch and wall outlet (these are likely to be be separate).
Does the wall outlet look like an ordinary 13Amp socket, or like a plain white plastic plate with an entry slot at the bottom?
How big is the wire coming out of the oven, and what is it attached to (can you see terminals inside a plastic box? Is the wire a flex or is it a whitish or grey flat oval?