meadow was ley (or lei or various other spellings, still rarely used today as lea) and brook meant stream, as it does today. Beverley Brook was thus the Beaver-Meadow Stream. Tributaries Beverley Brook's longest tributary is Pyl Brook, long, which is a Local Nature Reserve. It flows from Sutton through Lower Morden to join it at Beverley Park in New Malden. Both brooks are on the Environment Agency's watchlist of rivers susceptible to flooding. Environmental improvements For much of the twentieth century Beverley Brook was joined by poorly treated sewage from a sewage works in Green Lane, Worcester Park. Since some pipe redirection enabling the removing of the works and the introduction of improved treatment methods in 1998, the range of wildlife species in the river has steadily increased. At Wimbledon Common, Beverley Brook has banks reinforced with wooden "toe-boarding", which prevents use by water voles, and there is scope for further such improvements. In fiction Beverley Brook is a regular character in the Ben Aaronovitch series of urban fantasy police procedural novels Rivers of London. She describes her kind thus: "'Orisa', said Beverley. 'We're Orisa. Not spirits, not local geniuses – Orisa'." See also Tributaries of the River Thames List of rivers of England References External links Beverley Brook Catchment Royal Parks press release on the improving water quality of the river, 1 January 2004 The Beverley Brook waymarked walk Beverley Brook Walk Beverley Brook Walk map Flow measurements Geography of the Royal Borough of Kingston upon Thames Geography of the London Borough of Merton Geography of the London Borough of Richmond upon Thames Geography of the London Borough of Sutton Geography of the London Borough of Wandsworth Putney Richmond Park Rivers of London 1BeverleyBrook