While checking a single Oyster fare (St Margarets (London) to King's Cross) I entered King's Cross NR as opposed to the LU station. Apparently there are no fares available between St Margarets and King's Cross NR.
Out of interest, what would I be charged if I took the train from St Margarets to Vauxhall, then tube to Finsbury Park and train to King's Cross NR?
Out of interest, what would I be charged if I took the train from St Margarets to Vauxhall, then tube to Finsbury Park and train to King's Cross NR?