Hi Stephen
I had to do this just a couple of months ago and found it really straight forward. You have to pull the oven out and rest in on something to protect the front bottom sill. Take of the back of the oven and you'll see how it goes.
Good luck
Kathy
Kathy, November 2009
Go to 'www.espares.co.uk' click on the black and yellow button to select the help videos. Select the one for a fan oven element and watch.