I'd never have considered that King's Cross to Ely via Peterborough would be a valid route, and a quick attempt to check the routeing guide seems to back this up (notwithstanding any mistakes I might have made!)
But National Rail Enquiries seems quite happy to offer this as a valid route at weekends, offering to sell me the £20.50 super off peak single for this journey, whether via (and changing at) Peterborough, or direct via Cambridge.
However, it only seems to allow it when travelling northbound, and says I need two tickets to make the journey via Peterborough if I look for the reverse southbound journey from Ely to London. It also says I need two tickets for both northbound and southbound journeys on weekdays.
What's going on here?
But National Rail Enquiries seems quite happy to offer this as a valid route at weekends, offering to sell me the £20.50 super off peak single for this journey, whether via (and changing at) Peterborough, or direct via Cambridge.
However, it only seems to allow it when travelling northbound, and says I need two tickets to make the journey via Peterborough if I look for the reverse southbound journey from Ely to London. It also says I need two tickets for both northbound and southbound journeys on weekdays.
What's going on here?