Calling at: Three Bridges, Gatwick Airport, Horley, Redhill, Purley, East Croydon, London Blackfriars, London St Pancras (Intl), Kentish Town, West Hampstead Thameslink, Cricklewood, Brent Cross West, Hendon, Mill Hill Broadway, Elstree & Borehamwood, Radlett, St Albans, Harpenden, Luton Airport Parkway, Luton, Leagrave, Harlington, Flitwick, Bedford