asked the Secretary of State for Northern Ireland what percentage of Northern Ireland's gross domestic product is represented by goods transported to Great Britain; what is the value of those exports and the form of transport used; and if he will break down the exports into broad categories, using 1981–82 as an example.

There is no Customs and Excise control on goods moving from one United Kingdom region to another. It is not possible, therefore, to value or categorise goods transported from Northern Ireland to Great Britain.