When the Channel Tunnel opened in 1994, the undersea rail link brought Britain closer to the European mainland than ever before.
However, had things gone differently, history might have taken a different turn, with a massive bridge being a competing proposal for a fixed Channel crossing.
The Euro Route proposed that motorists drive across the Channel, potentially stopping for duty-free shopping in the middle of the sea.
Forget the double handling involved in putting cars on trains and doing everything by rail.
The concept of a permanent tunnel or transit link between Britain and France dates back a long way.
Author's summary: A proposed bridge to cross the Channel.