Set up clock?

This MAY be a valid manual:

http://www.belling.co.uk/media/62510/08%2027505%2002%20-%20Belling%20DFt%20ranges%2037.pdf

You may be able to find more here:
http://www.belling.co.uk/customer-care/manuals/

Alternatively find the exact model number and do a Google search for that and the word "manual"

XXX
December 2015

Turn off the power - the big switch - turn it back on after a few seconds and the clock should flash - set the time - any time will do the cooker knows no different.

Depress and hold in buttons 2&3 from the left and at the same time use the plus and minus buttons to set the time of day.

Anyway - this is how it works on my cooker...

Good Luck...
December 2015