asked the Secretary of State for Wales, as of the latest convenient date, what was the number of persons employed in advance factories in each of the last five years in Wales.

The best available estimates are as follows:

1975	6,100
1976	5,500
1977	5,980
1978	6,700
1979	8,780

These figures relate to factories built since 1964: many of the projects in factories let in recent years are still in the process of building up.