 The most ambitious proposal was the "Cathcart District Railway" (CDR) and this was favoured by the Caledonian, which offered (in March 1880) to work the line at cost if it were connected only to their lines.As the Glasgow Barrhead and Kilmarnock Joint Railway, managed independently, was objecting to the running powers application over their line.Accordingly, the CDR withdrew the proposal for those running powers, and their Parliamentary Bill was unopposed as a result.