asked the Secretary of State for Scotland what action his Department has taken to promote the use of unleaded petrol in Scotland.

As stated by my hon. Friend the Minister for Environment, Countryside and Planning in his answer of 23 June 1986 to my hon. Friend the Member for Lincoln (Mr. Carlisle) at column 3, the Government's immediate aim is the establishment of a network of filling stations supplying unleaded petrol. This should be primarily a matter for the industry but the Government do not rule out the need for other measures should they prove necessary.