Make the most out of the space available in your cooker by utilising an oven base shelf, as demonstrated by eSpares in this video.
View Oven Base Shelf
Video Transcript
This is the oven base shelf from Electruepart, it has legs which fold down enabling it to stand at the bottom of your oven cavity, making better use of the space available.
It's ideally suited as a warming shelf or alternatively as a cooling tray for things such as cakes and pies.