Gallery: Foot and mouth outbreak

A police officer stands guard at the entrance to a farm near Egham, Surrey Photograph: Toby Melville/Reuters

A car's wheels are sprayed with disinfectant as a precautionary measure as it enters a farm within the grounds of Windsor Castle Photograph: Kirsty Wigglesworth/AP

Cattle graze in fields in Windsor Great Park Photograph: Toby Melville/Reuters

A government sign warns of an outbreak of foot and mouth disease at farmland near Egham, Surrey Photograph: Peter Macdiarmid/Getty

A forklift and lorry arrive at Hardwick farm in Surrey to help dispose of the cattle being culled Photograph: Lewis Whyld/PA

A highland cow stands in a field outside an agricultural market in Lanark, Scotland, after checks had to be made on a single sheep showing signs of illness Photograph: Jeff J Mitchell/Getty

Police stop traffic going in and out of the agricultural market at Lanark, Scotland, as precautionary checks are made on a sheep showing signs of illness Photograph: Jeff J Mitchell/Getty

A policeman outside Hardwick farm in Surrey Photograph: Lewis Whyld/PA

A Defra vet holds her head in her hand as she works at farmland in Egham, Surrey Photograph: Edmond Terakopian/AFP

Warning notices appear on farms to protect cattle after an outbreak at Milton Park farm, in Egham, Surrey Photograph: Johnathan Brady/EPA