Redland Aggregates Ltd Westminster Diocesan Trust Land DHT4 Adjacent Land Use Plan Scale 1:10,000 , 1:10560. Covers the following areas: London Colney, Frogmore, Brickett Wood, Radlett, Shenley, Chiswell Green, Park Street, St Albans. Also shows location of the Rail Aggregate Depot. [Likely to have been drawn up in 1979-1980]. n.d.