postage stamp post commemorate commemorative opening open channel tunnel le sous la manche chunnel 1994 link linking folkestone kent united kingdom coquelles pas-de-calais calais france english channel strait of dover high-speed eurostar passenger trains eurotunnel shuttle road vehicles freight railway public railroad transport eurotunnel service network system britain great france graphics graphic design word wording words phrase letters letter lettering type symbol print printed printing nineteen nineties 1990s 90s philately office uk british vintage nostalgia nostalgic old - Alamy