The Channel Tunnel, or Chunnel officially opened to the public May 6, 1994
The 50.46-kilometre (31.35 mi) tunnel cuts under the English Channel linking the British Isles to mainland Europe. 

Opening of The Channel Tunnel Series
British Lion and French Cockerel over Tunnel
Symbolic Hands over Train
British Lion and French Cockerel over Tunnel
Symbolic Hands over Train
Included 4 stamps and a presentation pack
Issued by Royal Mail May 3, 1994
Designers: George Hardie and jean-Paul Cousin