Jeremy Clarkson has been accused of helping to 'hide' the 'horrors' of industrial agriculture, after fellow broadcaster Chris Packham branded him an 'agitator' and claimed Clarkson's Farm presents an 'entirely unrealistic' picture of British farming. Posting on Instagram, Packham shared statistics about UK farming covering animal welfare, pesticide use and habitat destruction, and asked pointedly: 'Tell me Jeremy Clarkson, is it really all happy…