A less than "holy" combination of the Environmental Officers of Health (EHO) and the pest control industry had for some time been conducting a campaign for the removal of Crown Immunity from hospitals. They had not been so vociferous in their campaign to remove the same privilege from prisons and the armed services. I find it difficult to believe this was out of conviction that other institutions were trouble free. For in 1985 of the 191 Institutional outbreaks only 37 (19%) were in hospitals. The outbreak of Salmonella food poisoning at the Stanley Royd hospital provided enough public pressure to be generated for crown immunity to be removed from NHS premises. It remained in prisons and the armed services.