The implication is that the characters have been trapped in a timewarp since the late 1960s, and that this is probably as a result of Mrs Merton's firm insistence that things should stay as they are, even if we must occasionally make an effort to stay in touch with the present: "People don't want trifle in the 90s," as she puts it.
The implication is that the characters have been stuck in a time warp since the late 1960s, and this is likely due to Mrs Merton's unwavering insistence on maintaining things as they are, even if we must occasionally try to stay connected with the present: "People don't want trivialities in the 90s," she says.