The Mutant Phase (Nicholas Briggs) Audio Visuals
The Mutant Phase (Nicholas Briggs) 
1986 Audio Visuals UK
1986 Audio Visuals UK
AudioVisuals #8
Cover says written by Samuel Flint. This is a pseudonym for Nicholas Briggs. Later remade as a Big Finish drama.
Product description -
Analyas VII offers a world of contentment - an escape from the galaxy's hurly-burly... Or is it the breeding ground for a hideous nightmare instigated by the implacable Daleks in their struggle against the dreaded Mutant Phase?
Also available at an unknown time as a double cassette release. Sleeve is pictured. Art on this is by Nick Layton