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
South East England in Horley, Surrey, north-east of Gatwick Airport, and NHS South Central (for the west of the region), on the Newbury Business Park in the east of Newbury, off the A4. Similarly there is the South East Coast Ambulance Service on the B2163 at Coxheath (for Kent), on the A217 at Banstead (for Surrey), and on the A277 in Lewes (for Sussex). The South Central Ambulance Service is headquartered on the B4100 next to Bicester Town railway station, with offices at Otterbourne, Hampshire and Wokingham. The charity-funded air ambulances are Kent Air Ambulance at Marden, Kent; Hampshire & Isle of Wight