Indeed. It is how it should be.the Cambridge "Stopper" from Kings Cross runs fast from Finsbury Park to Potters Bar, skips Brookmans Park and Welham Green and only then calls every station from Hatfield to Cambridge.
the Cambridge Express runs fast KGX to CBG then once an hour continues all stops to Kings Lynn.
Really we can find multiple examples on all lines out of London especially, and that's really how it should be.
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