Hi - it's going to have to be 30 amp cable and socket box, and the cable has to have its own connection into the consumer unit ( where the fuse boxes are) If there isn't a spare fuse, an electrician will have to fit an extension to allow the connection. You probably know all this already, but much of a professional's time will be taken up in running the cable and fitting the cooker socket adjacent to the appliance, and given any sort of of DIY nous, you can do all that yourself, as well as a pro can, then just get him to do the tests and the final connections and give you the necessary bits of paper (used to be called a completion certificate when I was working in the plumbing trade) so you know it's all proper and legal. B and Q will sell you the correct bits and pieces. Hope this helps