Over the next few years the northern section of the line may again see changes following the decision in February 2006 to transfer responsibility for Euston-Watford suburban services (on the Watford DC Line) from the Department for Transport (DfT) to Transport for London (TfL).
I løbet af de næste få år vil banens nordlige sektion igen blive ændret efter beslutningen fra februar 2006, om at overdrage ansvaret for forstadstogene Euston-Watford (på Watford DC Line) fra Department for Transport (DfT) til Transport for London (TfL).