Cliff Richard had seen a dip in popularity in the early 1970s until his 1976 album I’m Nearly Famous gave him major success. This comeback kept Richard regularly in the charts until the mid-1980s. Of the albums released during this period, only the 1978 Small Corners gospel album and Green Light failed to make the top 10.
https://en.wikipedia.org/wiki/Green_Light_(Cliff_Richard_album)