Picture posting is enabled for all :)
Our Allotment Association has banned all non compostable materials. I'm in favour, as I get fed up with neighbours who don't weed or cultivate, just put down more carpet or plastic.
I must admit to using some carpet to keep the weeds down in places, but I can understand why they are banned in some places. Last year I was digging over (digging out a huge patch of Nettles) the south end of my plot, and was dismayed to find that some kind soul had just covered the Nettles with a 70's carpet. Years later I was trying to get rid of them, and found that the carpet was tangled up with the thick runners and it took me two days to dig it all out :( .