Here is a collection of articles from various sources including Look-In and TV times.
TV Zone Article on Slaves of Jedikiah - pdf format (With thanks to Ian Veal)
Blakes's Heaven An interviedw with Darrol Blake, director of A Rift in Time. TV zone mag issue 58
1980's Tele Fantasy Convention review
The Teenager with a Difference Published in Look-in week ending 16th June 1973
Tomorrow People Fact Files.