The description below is taken from the Airfix catalogue this kit was first seen in. There is also extra information underneath the main catalogues description including the changes to the name of this kit in the catalogues.
Airfix Catalogue description:1983 edition catalogue, listed as TOP SECRET.
1984 edition catalogue, listed as Imperial Shuttle from Imperial Shuttle Tydirium.
Airfix Series (first appearance): 12 First Issued: 1982
This kit appeared in these catalogues:
1983 Edition Ref: 9 12102 1984 Edition Ref: 9 12102 1985 Edition Ref: 912102
Just some of the kits listed...