Thames Valley officers were helping the Environment Agency with a site visit to an undisclosed area. The white caravan which was left there was reported stolen last year and is now recovered on the back of a lorry. READ MORE: City river workers 'off sick because of dirty water' as safety concerns growElsewhere, the rural crime team's police constables Carney-Smith and Kamalee attended a report of a possible arson near Lambourn, just south of the border in West Berkshire. An investigation concluded that it was likely a wildfire, the police said. A spokesman said: "Tackling fires is extremely difficult in this heat so please be extra careful especially near fields and woodland."