What is rating (amps) of oven you're looking at as IanB mentioned it depends on what you get?
Our electric Oven was rated max 13amp (as we still used a gas hob) and in fact with these you can use a normal 13amp plug.
If it's a full cooker (ie rated higher than 13 amp - likely 32+ amps) then it will require a dedicated feed from CU (consumer unit) with a rating of 32amp or 40amp MCB (Miniature Circuit Breaker - ie fuse). It would have to be RCD consumer unit or if not, use a 32/40amp RCBO instead of MCB.
IMHO, if you do have to choose between 32amp or 40amp then you may as well go for 40amp protection so therefore futureproofing it.