Conversation so far:
What is important about the Mike Batt era?
the band brought in producer Mike Batt (best known for his musical association with the Wombles and, more recently, Katie Melua) to work on their eighth album.
How well did the band perform when they brought in the producer Mike Batt and Katie Melua?
All Around My Hat, and their biggest success would come with the release of the title track as a single .
Around what dates did this happen?
it reached number 5 in the UK Charts in late 1975.
How long did it stay on the charts?
CANNOTANSWER.
What happened after the song reached number 5 in the UK charts?
Other well-known tracks on the album included "Black Jack Davy" (sampled by rappers Goldie Lookin Chain on their track "The Maggot".
Did any of those reach the charts?
they have not had another hit single, nor any success in the album chart since the late 1970s.

Question: What happened afterwards since they didn't have another single or success?
Self-contained rewrite: Aside from "All Around My Hat", What happened afterwards since the Mike Batt era didn't have another single or success?