After the 1960s, lack of investment led to local services and the station becoming increasingly run down.
By the early 1980s, Marylebone was under serious threat of closure.
In 1983, British Rail chairman Peter Parker commissioned a report into the possibility of converting Marylebone into a 'high-speed bus way', whereby Marylebone would be converted into a coach station.
The tracks between Marylebone, Harrow-on-the-Hill and South Ruislip would have closed, and been converted into a road for the exclusive use of buses and coaches.
British Rail services via High Wycombe would have been diverted into Paddington, and the Aylesbury services would have been taken over by London Underground on an extended Metropolitan line, and then routed to Baker Street.

British Rail formally announced plans to close Marylebone on 15 March 1984, pending a statutory consultation process, and closure notices were posted at the station.
The proposals proved controversial and faced strong opposition from local authorities and the public, leading to a legal battle which lasted for two years.
Despite the pending closure, passenger numbers only dropped by about 400 per day from 1968 levels.
The conversion project proved impractical due to the headroom limitations on the line and the closure was quietly dropped.
After the 1960s, lack of investment led to local services and the station becoming increasingly run down. By the early 1980s, Marylebone was under serious threat of closure. In 1983, British Rail chairman Peter Parker commissioned a report into the possibility of converting Marylebone into a 'high-speed bus way', whereby Marylebone would be converted into a coach station. The tracks between Marylebone, Harrow-on-the-Hill and South Ruislip would have closed, and been converted into a road for the exclusive use of buses and coaches. British Rail services via High Wycombe would have been diverted into Paddington, and the Aylesbury services would have been taken over by London Underground on an extended Metropolitan line, and then routed to Baker Street.
British Rail formally announced plans to close Marylebone on 15 March 1984, pending a statutory consultation process, and closure notices were posted at the station. The proposals proved controversial and faced strong opposition from local authorities and the public, leading to a legal battle which lasted for two years. Despite the pending closure, passenger numbers only dropped by about 400 per day from 1968 levels. The conversion project proved impractical due to the headroom limitations on the line and the closure was quietly dropped.
Marylebone station