OK, given its a single oven, it probably comes with a flex and a plug (unless you already have it and it hasnt).
If its electrical rating is below 3kw, 3000w, 13A, you can put a plug on it and plug it in.
The socket for the oven can be taken as a "spur" from the cooker circuit usually, as this can then be isolated using the cooker switch. Junction box shouldnt be nessecary. Its far tidyer to do something like this:
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local