carried out, on samples taken from the dead birds, at the Veterinary Laboratories Agency in Weybridge, Surrey. Another 1,500 birds died on 2 February. Then on 3 February 2007 the H5N1 causation was confirmed. A 3 km protection zone, 10 km surveillance zone and a restricted zone encompassing 2000 km2 were set up. Another 159,000 turkeys were slaughtered with the cull being completed on the evening of 5 February. Also on 5 February there was criticism that nearby farmers had not been advised as to the action to be taken. Around 320 workers at the plant were given anti-viral drugs. Although a vet from the site was admitted into hospital, suffering from a 'mild respiratory illness' during the evening of 6 February, it was found not to be bird flu. The plant was thoroughly disinfected, with cleaning complete on 12 February, and permission being given for production to resume. It emerged in a highly critical report from Defra that there was a series of biosecurity failings at the Holton plant, some of which were drawn to the company's attention in the past. These included "gulls were taking turkey waste to roosts on top of the turkey-house 500 m away" and "holes in the turkey houses could have allowed in birds or rodents". Defra minister Jeff Rooker stated in a House of Lords debate on 22 February that the outbreak was "exclusively a Bernard Matthews Holton problem". Hungarian connection The Government, on 8 February, admitted that the outbreak may have been caused by semi-processed turkey meat imported directly from Hungary, where the disease is prevalent, despite earlier in the week the Environment Secretary, David Miliband assuring the House of Commons that there was "no Hungarian connection". Bernard Matthews had been importing 38 tons of partly processed turkey meat on a weekly basis from their Saga Foods company, in Sárvár, Hungary, to a processing plant next to the farm. Though Saga Foods lies from where the recent Hungarian H5N1 outbreak had occurred, a company director admitted it was "possible" that some of the meat could have come from the exclusion zone. In response to this revelation, Whitehall expressed concern over biosecurity and whether any meat may have been distributed for human consumption in Britain. On 9 February 2007 the Hungarian authorities started an investigation to try to establish whether there was a connection between the Suffolk and Hungarian outbreaks. On 11 February