We’ve had an email from Andrew Whittington:

These are the industrial carrying bags, usually made from a plastic woven material with four strong carrying handles for a crane or fork lift truck to move large quantities of building materials such as sand and stone. These are being seen more and more delivered to domestic homes, and are seen as a disposable item and the companies are not interested in having them back.

At the moment I have one in the garden and i’m using it as a tempory compost bin until I can make my own, however the plastic is starting to rot into tiny pieces, any other ideas what I can do with it?

I’ve been seeing these about more and more too and would probably go for the compost thing or using the material for hanging basket (etc) lining - but I’m sure the latter doesn’t make best use of the bags and would probably have the same rotting problem. So any ideas?