Flood maps published by the Environment Agency are so inaccurate that they are significantly distorting house prices, homeowners have claimed.

Bisham and Marlow flood warden Mike Post has been fighting since 2014 to have the maps redrawn after they showed whole rows of homes besieged with water, when none had been affected in the storms of that year or 2003.

The map of the Berkshire and Buckinghamshire villages also currently includes details of a deluge in 2002 that never happened and places businesses and churches within the Thames flood zone, even though they remained dry.

“This preposterously inaccurate map includes many, many features which demonstrably did not flood such as my own house and garden,” said Mr Post.

“The map incorrectly shows whole swathes of Bisham and Marlow as being within the 2014 flood outline. The map has a whole area of fields underwater which was not the case.

“In addition the 2003 flood outline is still in error, wrongly showing properties which did not flood whilst excluding properties which did.

“A Government Agency publishing false information on historic flooding has serious consequences.

“Property owners or potential purchasers will be misled about flooding history of a property with the possibility of significant distortion of property values.”