 All are at least tri-current and are able to operate on 25 kV, 50 Hz AC (on LGVs, including High Speed 1, and on UK overhead electrified lines), 3 kV DC on "lignes classiques" in Belgium and 750 V DC on the UK former Southern Region third rail network.The third rail equipment was removed in 2007 when the second section of High Speed 1 was opened between London and the Channel Tunnel, which uses 25 kV, 50 Hz AC.Five of the Three Capitals sets owned by SNCF are quadri-current and are able to operate on French "lignes classiques" at 1500 V DC.