Did Oxford to Bedford require a major upgrade between Bletchley to Bedford?This is what has been published so far on the service pattern. What will actually happen is just conjecture
Route tph Calling at Oxford to Milton Keynes Central 2 Oxford Parkway, Bicester Village, Winslow, Bletchley Oxford to Bedford 1 Oxford Parkway, Bicester Village, Winslow, Bletchley, Woburn Sands, Ridgmont Aylesbury to Milton Keynes Central 1 Aylesbury Vale Parkway, Winslow, Bletchley