West Ruislip, my local station, is a combined National Rail and London Underground station. Tickets can be purchased with origins/destinations of West Ruislip OR Zone U1256 London.
The section between West Ruislip and South Ruislip is interavailable, i.e. London Underground tickets can be used on National Rail, and vice versa.
But I've often wanted to know what services can be used beyond South Ruislip.
E.g. if I purchase a ticket from West Ruislip to Cambridge, route '+Any Permitted', intending to use it via Liverpool Street, can I just take the Central Line all the way to Liverpool Street, technically using South Ruislip as my interchange between National Rail and London Underground.
Conversely, if I held a Zone U1256 to Cambridge ticket, can I use it on National Rail services via Marylebone, i.e. where is the interchange between LU and NR permitted to take place?
Both these such tickets would be valid by either operator between West Ruislip and South Ruislip, but what about beyond South Ruislip?
The section between West Ruislip and South Ruislip is interavailable, i.e. London Underground tickets can be used on National Rail, and vice versa.
But I've often wanted to know what services can be used beyond South Ruislip.
E.g. if I purchase a ticket from West Ruislip to Cambridge, route '+Any Permitted', intending to use it via Liverpool Street, can I just take the Central Line all the way to Liverpool Street, technically using South Ruislip as my interchange between National Rail and London Underground.
Conversely, if I held a Zone U1256 to Cambridge ticket, can I use it on National Rail services via Marylebone, i.e. where is the interchange between LU and NR permitted to take place?
Both these such tickets would be valid by either operator between West Ruislip and South Ruislip, but what about beyond South Ruislip?