 In February 2014 after a sustained period of heavy rain the River Thames was at a high level which caused water to back up in the River Colne.This then spilt into the Staines Reservoirs Aqueduct which channelled the water to Staines.The  aqueduct spilt over into the River Ash which over topped its banks and flooded about 80 houses in the Leacroft and Priory Green area and damaged the aqueduct.