The Two Way Mirror was intended as a pilot for the kind of 'sexy' soap opera that would compete with Number 96.
According to producer-director Alan Coleman in his autobiography:
The programme, if successful, was to be set in a cosmetic and fashion house–and featured a two-way mirror through which characters could watch nude photographic sessions–or whatever–that would take place in the studio next door. (One Door Shuts, p.266).
The series was not picked up after its initial pilot was filmed.