After three days of legal submissions, the RSPB offered no evidence against Simon Clowes of Davis & Bowring Sporting Agency.

The prosecution followed a raid by the RSPB and North Yorkshire police at Moor House Farm, Nidderdale, in 2007.

Mr Clowes told Shooting Times: ?This case highlights the attention keepers, moor owners and their managers must pay to the control of substances hazardous to health.?