sub-branches One branch formerly had three sub-branches: from East Grinstead to: Three Bridges Lewes; the northernmost section of this branch is preserved as the Bluebell Railway, operated by steam and classic trains. Tunbridge Wells. (All three of these terminus towns are served by other lines.) Ashurst on the Uckfield branch was a junction for Tunbridge Wells (Kent) part of which is used by the 'Spa Valley Railway'. Eridge on the Uckfield branch is a junction for Tunbridge Wells (Kent) used by the 'Spa Valley Railway' It was until 1965 a junction for Cuckoo Line to Eastbourne. A short stretch of the "main line", between Uckfield and Lewes is preserved at Isfield as the Lavender Line. Between Hurst Green and Lingfield (in Surrey) there was a connection with the Redhill to Tonbridge line until 1965. Until 1983 there was a junction at Selsdon (in Greater London) with the Woodside and South Croydon Joint line to Elmers End. Proposed developments A £140,000, six-month study was commissioned by the East Sussex County Council and Network Rail looking into the possibility of rebuilding the line between Uckfield and Lewes after a campaign by the Wealden Line Campaign Group. In July 2008 the Central Rail Corridor Board (a joint group of local councils and stakeholders) study, commissioned by Network Rail, reported that there was not a forecast viable economic case for reopening, citing a £141 million cost and a low anticipated benefit to cost ratio (BCR) of 0.64 to 0.79; in comparison a BCR of 1.5 was the minimum needed to obtain finance for the scheme. Brighton Main Line 2 The Wealden Line Campaign Group has, in addition to campaigning for the reopening of a line between Uckfield and Lewes, proposed an extension north from to Elmers End. There would also be new platforms at , and of the East Coastway line would be upgraded. The line would branch off the East Coastway beyond . A new Ashcombe tunnel would be bored after crossing the A27 before crossing the Keymer Junction (in Burgess Hill) to Lewes line. The line would take back the preserved Lavender Line at Isfield. No stations would be reopened between Lewes and Uckfield, and all level crossings would be closed. A new station at south of the current one would allow 12-carriage trains. The line to would be double-tracked and electrified, with a maximum speed limit of . New passing loops