DILIGENT SYSTEMS LTD Company number 08770270 · Monitor this company Active Overview People 1 Financial Control Documents Analysis Location Related Registered office Address37 Clydesdale Avenue, Stanmore, Middlesex, HA7 1LN PostcodeHA7 1LN Companies at this postcode 24 Average house price in HA7 1LN £582,000 (13 sales) Map