Wells Tunnel. Parliamentary powers were sought in 1979 to bore a second Grove Hill Tunnel, but there was much opposition from local residents. This, and the high cost, caused the proposal to be abandoned. The track in Grove Hill Tunnel was relaid on a concrete base, allowing alignment to be precisely controlled. The line was declared to conform to the standard C1 loading gauge on 14 March. The first passenger carrying train comprising C1 stock to use the line was a railtour on 15 March hauled by 50 025 Invincible. It was organised by the Southern Electric Group and ran from Paddington to . A preview service of electric trains ran on 27 April 1986 and the full timetabled service commenced on 12 May 1986. The next day, a wrong-side failure occurred involving three signals between Tonbridge and Hastings. Contractors had made errors in the wiring of the signal heads. With the inauguration of electric services, a half-hourly service was operated, with trains departing from Charing Cross at 15 and 45 minutes past the hour. Those departing at xx:15 called at , Sevenoaks, Tonbridge, High Brooms, Tunbridge Wells, Wadhurst, Battle, St Leonards Warrior Square and Hastings, taking 84 minutes. Those departing at xx:45 called at Waterloo East, London Bridge, Orpington, Sevenoaks, , Tonbridge and then all stations to Hastings, taking 99 minutes. The Royal Train visited the line on 6 May, conveying Queen Elizabeth the Queen Mother. It was stabled at Wadhurst whilst she ate lunch. The train was hauled by a Class 73 diesel-electric locomotive. Upon electrification, services were operated by 4CEP, 4CIG and 4VEP electric multiple units. Class 508 electric multiple units also operated services on the line from the Redhill direction as far as Tunbridge Wells. When these units were withdrawn in the mid-2000s, they were replaced by Class 375 Electrostar, Class 465 Networker and Class 466 Networker units. Train services on the line are provided by SE Trains, and are mostly operated by Class 375 Electrostar, or occasionally Class 465/466 Networker units. The line still sees a freight service to and from British Gypsum's sidings at Mountfield. The line retains all its original intermediate station buildings, and is considered a well-preserved example of a Victorian secondary rail route. Accidents and incidents A number of accidents have occurred on the Hastings line, none of which have involved the death of a passenger. On 4October 1852, a passenger