KML is from Wikidata The RH postcode area, also known as the Redhill postcode area, is a group of twenty postcode districts in South East England, within seventeen post towns. These cover east Surrey (including Redhill, Reigate, Betchworth, Dorking, Lingfield, Horley, Oxted and Godstone) and northeastern West Sussex (including Crawley, Gatwick, Haywards Heath, Billingshurst, East Grinstead, Burgess Hill, Horsham and Pulborough) plus small parts of northwestern East Sussex (including Forest Row).