TN postcode area TN postcode area The TN postcode area, also known as the Tunbridge Wells postcode area, is a group of 40 postcode districts in England, which are subdivisions of 24 post towns. These postcode districts cover an extensive area from the Greater London border at Westerham to the Sussex coast, including south Kent (including Royal Tunbridge Wells, Tonbridge, Ashford, Sevenoaks, Cranbrook, Edenbridge, New Romney, Romney Marsh and Tenterden) and northern and eastern East Sussex (including Hastings, Battle, Bexhill-on-Sea, Crowborough, Etchingham, Hartfield, Heathfield, Mayfield, Robertsbridge, Rye, St Leonards-on-Sea, Uckfield, Wadhurst and Winchelsea). Additionally, small parts of TN14 and TN16 cover the rural
Sheerness only in 1948. Sheerness is located at (51.441, 0.7605), in the north-west corner of the Isle of Sheppey in North Kent. To the north, sandy beaches run along the coast of the Thames Estuary. To the west, the outlet of the River Medway flows into the Estuary. An area of wetlands known as The Lappel lies between the river and the south-western part of town. Marshland lies to the south and the east. The main rock type of the Isle of Sheppey is London Clay, which covers most of North Kent. Along with most of the Kent coast, the uninhabited