Luton, Luton Airport Parkway, Harpenden, St Albans, Brent Cross West, West Hampstead Thameslink, London St Pancras (Intl), Farringdon, London Blackfriars, East Croydon, Gatwick Airport, Three Bridges, Haywards Heath, Wivelsfield, Burgess Hill, Hassocks, Preston Park, Brighton
Luton, Luton Airport Parkway, Harpenden, St Albans, Radlett, Elstree & Borehamwood, Mill Hill Broadway, Hendon, Brent Cross West, Cricklewood, West Hampstead Thameslink, Kentish Town, London St Pancras (Intl), Farringdon, London Blackfriars, East Croydon, Redhill, Horley, Gatwick Airport, Three Bridges
Luton, Luton Airport Parkway, Harpenden, St Albans, Brent Cross West, West Hampstead Thameslink, London St Pancras (Intl), London Blackfriars, East Croydon, Purley, Redhill, Horley, Gatwick Airport, Three Bridges
Luton, Luton Airport Parkway, Harpenden, St Albans, Radlett, Elstree & Borehamwood, Mill Hill Broadway, Hendon, Brent Cross West, Cricklewood, West Hampstead Thameslink, Kentish Town, London St Pancras (Intl), London Blackfriars, East Croydon, Purley, Horley, Gatwick Airport, Three Bridges