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Bae Systems, Christopher Martin Road, Basildon, Essex
Bedells End, Roxwell Road, Writtle, Chelmsford, Essex
Elettra House, New London Road, Chelmsford, Essex
English Electric Valve Company, Waterhouse Lane, Chelmsford, Essex
Guys Farm, St Johns Road, Writtle, Chelmsford, Essex
Marconi Commerce Systems, Compton Close, Basildon, Essex
Marconi Communications Systems, Radford Crescent, Billericay, Goosebury Green, Basildon, Essex
Marconi Communications, New Street, Chelmsford, Essex
Marconi Radar, Writtle Road, Chelmsford, Essex
Marconi Research Centre, Great Baddow, Chelmsford, Essex
Marconi School Of Wireless Communications, Arbour Lane, Chelmsford, Essex
Marconi Social Club, Victoria Road, Chelmsford, Essex
Marconi Wireless Station, Lowford Lane, Writtle, Chelmsford, Essex
Marconi, Waterhouse Lane, Chelmsford, Essex
Marconi, South Woodham Ferrers, Bushy Hill, Chelmsford, Essex
Ongar Radio Station, North Weald Bassett, Epping Forest, Essex
Taveloc House, Freebournes Road, Witham, Braintree, Essex
The Anchor Works, Anchor Street, Chelmsford, Essex
The Old Silk Mill, Hall Street, Chelmsford, Essex
Wireless Station, Pottery Lane, Broomfield, Chelmsford, Chelmsford, Essex
Wireless Station, Rochford Road, Chelmsford, Essex