Thanks for the advice. Most baskets in the UK are metal. Tesco have a 'free' supply! I think I'm going to give it a go. I have a pizza pan for an ash tray. The feet setup was exactly what I was going to go for.
I was hoping that the rectangular shape wouldn't have much of an effect, considering the food will be 24" away from the base of the fire.
Anyone else have an opinion on this point?