[4][5] However, in March 2010 in accordance with multilateral environmental regulations and evidence that gas pollutant thresholds would be further breached within the wider area the English High Court of Justice ruled that the plan which the Department had submitted must be reconsidered.

[7] Since 2009 BAA have been acquiring property in Sipson and elsewhere when advertised for sale which means there will be fewer resident owners to oppose further plans for expansion with a third runway.

Contrary to this movement, opponents such as actress Emma Thompson and various others have bought land[citation needed] within the boundaries in 2009 with a view to preventing such expansion.

On 2020-02-27 A court ruled the expansion unlawful in a case brought by environmental groups, councils and the Mayor of London.

The King William IV public house at the Sipson crossroads was built in the 16th century, and later altered, including a refronting in the 1930s.