I mended the following parts of my Creda oven as follows:

Oven is a "Creda Plan Vista Oven 43911"

Oven element (one each side) Creda part #6224597, obtained from
ezee-fix.co.uk

Oven lamp glass Creda part #6221494, obtained from espares.co.uk

Oven light bulb (this is a BC pigmy bulb - very hard to find as most
such bulbs have a screw fitting not a bayonet fitting), obtained from
Kitchenwareonline.com part number AWCL804

email me if you want any more info

Peter