Hairy Bikers Large Non Stick Oven Tray (43cm x 29cm) only £1.99 at Home Bargains.
I thought these were a fantastic price. They are solid, sturdy, non-stick and oven, freezer and dishwasher safe. They are cheaper than Home Bargains smaller and less robust oven trays that we have had before that cost £2.49. They are selling on Ebay for about £6 each.
Found at Broadway, Liverpool store and there were at least 20 left on the shelf. Should be national.