per hour London Blackfriars to Sevenoaks service (from the table above) is extended through the 'core section' to/from (though a few services originate at Finsbury Park), with extra calls at City Thameslink, Farringdon, St Pancras International, Finsbury Park, , , , and .

As well as these services, during peak hours, several extra trains in each direction (approximately two trains per hour) run to/from (originating/terminating at either London Blackfriars, Luton, West Hampstead Thameslink or Kentish Town), all calling at in lieu of