a double oven should not be run off a plug.
A typical single oven (not cooker) designed for the UK dometic market will use about 10A.
A UK 3-pin plug is fused at 13A. A doulbe oven, or a single oven plus separate grill, will overload it.
Additionally, it is a large fixed appliance so it is not good practice to run it off a plug and socket. You are using a large amount of the circuit capacity, and may simultaneously wish to run a dishwasher, washing machine, tumble-drier, kettle or toaster, all of which are heav loads, and several used together may overload the circuit. A typical UK socket circuit will have a total capicity of 32A (other countries have lower capacity per circuit, due to a different design, and so have more circuits per house). UK houses usually have about one socket circuit per floor of the house, and sometimes an additional circuit for the kitchen and/or utility room due to the multiplicity of appliances. It is bad practice to put two heavy load appliances into a double socket, as it causes overheating unless they are only used intermittentkly for short periods, like a kettle and toaster. A washer and drier are particularly bad in this respect.
a typical double oven designed for the UK domestic market will use about 20A and can't safely run of a plug and socket.
A typical ordinary electric cooker designed for teh UK domestic market will need a 32A dedicated supply.
A typical range cooker will need a 40A dedicated supply, though some need more.