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.