No, and I don’t think I have ever said otherwise. However it is the scope of the problem that lacks evidence, in that I agree wildfowl are at risk and hence the ban on lead shot we already have. I am not convinced there is a problem with shot falling on agriculture or pasture land. Given the many years the local clay ground has shot over, yet we see, buzzards, woodpeckers, robins, pigeons, crows, rooks. seagulls, rabbits, fox etc etc.
If the lead shot is such a problem today, then it will still be in another fifty years as even if they banned lead tomorrow it will still be on the clay ground, mind you if you walk the ground today I doubt you will see any. The majority of tye ground is managed grass.