Twenty-seven voles booked into Wildwood captive breeding centre in February 2009 after being rescued by Thames Water before it started a four-year expansion at the works. They have since produced 50 babies. Hazel Ryan, Conservation Officer at the Wildwood Trust, said: "The water vole is Britain's most endangered mammal so we're glad Thames Water has taken time to transfer the Crossness voles to us for safe-keeping.”
