SNCF Class BB 10003 locomotive was used as a test machine for operations of the TGV-TMST on 750 V and 3000 V. In 1998 the locomotive was converted back to a non-experimental class - as SNCF BB 15007. (SNCF Class BB 15000) The results were not as good as synchronous motor technology; it was not until the introduction of GTO transistor technology that series production of an asynchronous induction motored locomotive began in France, as the "Eurostar" TGV (1992), and later the BB 36000 "Astride" (1996). SNCF Class BB 10003 The locomotive SNCF BB 10003 was an experimental prototype locomotive converted from a SNCF
Southern Railway (UK) London Bridge. Southern is owned by Govia — a joint venture between transport groups Go-Ahead Group and Keolis (a SNCF subsidiary) — which also owns the neighbouring "Southeastern". Officially named "Southern Railway Ltd", it was branded "Southern" on 30 May 2004, recalling the pre-nationalisation Southern Railway, with a green roundel logo with "Southern" written in yellow in a green bar. The Southern railway covered a large territory in south-west England including Weymouth, Plymouth, Salisbury and Exeter, where it was in competition with the Great Western Railway (GWR). To the east of this area it held a monopoly of rail services