I sent an email yesterday to the Asbestos Information Centre and i have received the following reply:-
Dear Lisa
Do not be concerned, the product will be asbestos cement and so only contain 10 to 12% asbestos, with that asbestos bonded into the cement matrix, no doubt little will have been released. Asbestos is a naturally occurring substance, so some asbestos fibres are naturally liberated into the atmosphere. Everybody is exposed to some asbestos fibres at all times, whether working under an asbestos cement roof, playing in the local park or sailing across the ocean. At the very low natural levels they do not cause a danger, they become dangerous when the level of free fibres is increased by the inappropriate use by man.
Any fibres released by this pile of old sheets will have blown away on the wind and so you should have no worries about using the allotment, Asbestos does not cause an illness when it is imbibed, it is only dangerous when it is breathed in in large quantities, which will not be the case here.
Regards
Tony Hutchinson
Director General
Asbestos Information Centre Ltd
I feel like i can stop panicking after this and all your replies....thank you so much everyone!