Some years ago an American friend of mine was travelling from Holyhead to Southport. When she arrived at Chester she asked how to get to Southport and for some reason was told to board the then through train via Altrincham, Stockport and Manchester instead of using Merseyrail. As this was a through train, it was of course permitted, but it meant she arrived hours later than I was expecting her. What other permitted routes can match this? Kirkby to Blackburn via Todmorden comes to mind, and on Sundays Southport to Blackburn.