Well, a good starting point would be to help yourself, rather than expecting other people to do it for you.
Check the manual for starters. If you don't have that, maybe do a simple Google search for the manual for your model and the word "manual" or even a simple search for something like "Hotpoint F05"
If you search for "Hotpoint F05", you may find on the very first page some results from http://www.hotpointservice.co.uk and from www.whitegoodshelp.co.uk
They should lead you straight to the solution.
Its something really simple to do and I don't see why I should spoon feed you
XXX, February 2017