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thanks mcmouse, i did say today though this is the 3rd and will be the 2nd tyre in 3 months which is unaceptable. i have said that this is the last one i'm fixing and i will take further action if it happens again.
i have got pics of the stuff in the tyre, i have kept the wood it was connected to and will be keeping the nails when i have the new tyre tomorrow. i have pics of the overloaded scrap bins and various pics of the car park with the bits of wood and discarded nails on the floor, and has 3 units share the car park and there the only 1 using wood (other 2 do shotblasting and steel slitting) so it puts the wood and nails 100% theres.