Very expensive! Local garden centre 95p per metre (1 metre wide)
BUT........................................ I was very lucky. I mentioned to my neighbour (a Civil Engineering Contractor) that I would like to buy some if he had any offcuts. A day or two later he turned up with two part rolls (about 1 metre wide) which were off cuts from 4 metre wide rolls. There were about 100 metres altogether and he wouldn't take anything for them. I hope to be able to supply his family with runner beans and tomatoes in the Summer.