My stoves oven is burning my kitchen cupboards

Generally there is not a fuse inside the unit. Either the transformer for the control failed or the heating element burned out.

check the contact points on the rear of the element they burn off after years of use, if the contacts are still good, Look at the element itself for any white marks on the element, if you see any , the element itself has probably burned out and need replacing , to get to the contacts,, depending on the oven, remove the back they should be right in sight , if you do need to replace the fittings on the wire ends, be sure and get heat range connectors

You should really have a gap between the cupboards and the oven which would be stated in the manufacturers instructions (if you still have them) . I presume it is a free standing oven? You could try Homelux insulation board or stove wrap and is sold in B&Q.

444445572 Gas double oven - stainless
http://www.espares.co.uk/parts/cookers-and-hobs/stoves/444445572/p/1092/630/0/914923
It has two different seals on that website, but I think It'll be obvious to you which one you'll need.

There are many types of seals that can be used which are universal and not specific. You must check with the Kitchen appliances spare parts dealer for assistance. Take along the sample of the gasket to get a look alike type.
Also there are many available in shops that sell penumatic tubings specially silicon gaskets. Only the groove need to match with the heat resistance characteristics.

check that the fibre glass is still in place and has not been soacked with water, you can get some fibre glass from your local stores and wrape it just after openning the couvers and puting them back to place

You have to remove the complete oven from the kitchen cupboard and then take the top and back off to give access to the wiring.
All the information is in the handbook, if you want a copy, then supply an email address, so that I can register it on my shared folder of the BT Digital Vault you for to take a copy.

this is normal,the stove must have this feature in order to cook properly and keep your food from tasting like last years turkey

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} It could be that your lower element is burnt out or ready to burn out. They last 3-5 years depending how much you use your stove.
Disconnect POWER to the stove, remove the screws holding the lower element to the back of the inside of the stove, pull out carefully and remove the 2 screws holding the wires on. Check the element with an ohm meter, it should read 0 (zero or very close) resistance on an ohm meter. You may also take it to a store that sells replacements ($25) and they may check it for you.

You will probably have to replace the oven door hinges.
This should solve the problem