The original Vic20 version of the game was advertised and sold by Graham Saunders of Northumberland; who is presumed to be the author. The adverts ran as early as September 1983 and as late as April 1984.
The apparently multi-platform Griffin Software release was advertised widely, including in Home Computing Weekly, issue 28, September 13-19 1983, where it was also reviewed.
This game could potentially be the same as this one.
[+] Users who have solved this game
[+] Users currently playing this game
It is the same game as the one descripted in this page: http://solutionarchive.com/game/id%2C7987/Time+Slip.html
We think it might be (hence the existing link between the entries) but is there any evidence you can share?