For 200 years the government has used cats to rid their buildings of mice. For a long time the animals remained unofficial, but then in the 1930s government departments started to apply to the treasury for a feline upkeep allowance. The cats thus became 'official' members of government and, as it turned out, well loved.There are many funny stories linked to these cats: Home Office cat 'Peter the Great' became a celebrity in 1958 when the public issued...