Saw these in my local Wilko (Liverpool, St John's).
The Quest multifuntion cooker was only £10 and had loads of them instock. These seem to be around £20 online.
They also had loads of Quest Teppanyaki Grills for £15 which also sell for around £20 online. Both get decent reviews on amazon. I can't see them on the wilko website so this is a instore only deal.
Instore only deal - see link for specs / info