Original sentence: In April 1987 a passenger service was reintroduced sponsored by Corby Borough Council – a shuttle train between Corby and Kettering, usually operated using a single Diesel multiple unit.The Council withdrew funding and the passenger service ceased in June 1990.This became irregular and unreliable
Edited sentence: In April 1987 a passenger service was reintroduced but it was only a shuttle train between Corby and Kettering, usually operated using a single Diesel multiple unit.This became irregular and unreliable; Corby Borough Council therefore withdrew funding and the passenger service was withdrawn in June 1990