@opinionsonus: The Channel Tunnel was built between 1987 and 1993 and officially opened on 6 May 1994. The rail line carrying Eurostar trains and shuttle services to mainland Europe enters the tunnel between Folkestone and Dover and resurfaces near Calais. The Channel Tunnel actually consists of three tunnels: two single track rail tunnels carrying traffic in either direction, and a central service tunnel that acts as the backbone of the tunnel’s ventilation, maintenance, and emergency systems. #eu #brexit #europe #uk #france