Chevening House is located near Chipstead, Kent, 800 metres from the M25
The 3,500-acre estate was bequeathed to the nation by Earl Stanhope for use by the Foreign Secretary of the day
A planning application has been submitted to build five, 10 metre high mounds in the estate s grounds to block the motorway, carrying 200,000 vehicles a day
Neighbours have slammed the privately funded £5m project which will take five years to complete
They says the plans are unnecessary and their lives will be blighted by 80 construction vehicles a day visiting the site