Rail operator Thameslink, which operates services in Borehamwood, Elstree and Radlett, has introduced a new summer timetable, starting on May 18.
The company hopes the new timetable will make services more reliable and punctual, and has altered the departure times of many peak-time trains by up to five minutes. Extra carriages are being introduced on some trains.
The new timetable is available at all Thameslink stations.
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