They are made by the guy's over at Products forWargamers.
At £2.50 a section, I think they are really good value you would struggle to make them yourself and paint them any cheaper.
Lightly flocked, I added additional TSS flock and Silfor Grass to make them blend in with my own terain pieces. I could perhaps do with 5-6 more pieces, perhaps adding shell damage to create a breach in the wire.
Something else for the Salute shopping list.