Miss Reynolds said: "Obviously this is devastating news for anybody who owns animals. We have a great deal of uncertainty and the situation means we are in the very early stages of dealing with it."
The news came after it was revealed yesterday that the institute at the centre of the foot and mouth outbreak was involved in five major health and safety breaches in the past year.
Six months ago the Institute for Animal Health was ordered to abandon experiments on TB-infected cattle following the discovery of flaws at its high-security isolation units. The safety failing happened at Compton in Berkshire, a sister lab to the foot and mouth research centre at Pirbright, Surrey, which is currently under suspicion of leaking the virus. If the same error had happened at Pirbright, it could have released foot and mouth into the countryside.
Today inspectors are due to publish their report into whether the foot and mouth outbreak came from a leak at the institute or the privately-owned Merial vaccine factory next door.