Suspected to be a fight over the inappropriate use of an apostrophe ( Nuke's rather than Nukes on the dogs coat )
Political 'heavyweight' and blogger Iain Dale gets upset when the book plug for one of his authors, Damian McSmear, is interrupted by a harmless anti nuke protestor in Brighton.
It might be best to hold the interview in private next time as I don't think it's good publicity to wrestle an old man to the ground who is just exercising his right to protest in public.
The dog seems to be biting his owner rather than Iain. Strange.