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The 'Colne' is a river in England. It flows mainly through Hertfordshire and forms the boundary between the South Bucks district of Buckinghamshire and the London Borough of Hillingdon. It is a tributary of the River Thames and flows into the Thames near Heathrow Airport.
The Colne currently rises near Colney Heath in Hertfordshire (although the now dry river bed can be followed further back for about 2 km to the Water End Swallow holes) and through the Chiltern Hills. It divides into the Frays River, the Colne Brook and the Wraysbury River. It links to the River Pinn and in the South is the "Colne Brook".
The villages of Colney Heath near St Albans, Colney Street near Radlett, Colnbrook near Slough and London Colney in Hertfordshire all take their name from this river.

Contents

Tributaries

Tributaries

These are listed from mouth (Thames) to source:

★ River Wraysbury

★ Colne Brook (Uxbridge Moor to River Thames)

★ Longford River

★ Duke of Northumberland River

★ River Frays

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★ River Pinn (Harrow Weald to Colne)

★ River Misbourne (Amersham to Uxbridge)

★ River Chess (Chesham to Rickmansworth)

★ River Gade

★ River Bulbourne

★ River Ver (Dolittle Mill to Colne)

★ Tykes Water (Aldenham Reservoir to Colne)

★ Alderbourne (Fulmer to Colne)

★ Ellen Brook (Hatfield to Colne)

★ Mimmshall Brook (Elstree to Colne)

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★ Catherine Bourne (Shenley to Mimmshall Brook)

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★ Potters Bar Brook (Potters Bar to Mimmshall Brook)