I’m in Calais, France. This is where the most traffic crosses the English channel. There are several ferries and there is the Eurotunnel. Eurostar is the company that runs the tunnel. The french owns 55% of this company. The belgian 5% and Brittain 45%. As of a few days ago Britain is talking about selling their part of Eurostar to get money för paying off some national debt. They estimate their share to be worth somewhere around 300 million pounds. So. If you have that laying around and wants to be part owner, then go for it!
No idea what the return on an investment like this might be, so before throwing the money out there, make sure you find out. For a descent investment you want at least 10%. At least! Personally i prefer around 25% or more. Also very reachable if you are a little bit creative.