A big power problem stopped trains. This happened in the tunnel. The tunnel goes between the UK and Europe.
Eurostar trains stopped. LeShuttle trains also stopped. Many trains were cancelled. People waited for a long time.
The problem was with electric wires. A LeShuttle train stopped too. This made things bad.
Many Eurostar trains did not go. These trains go to Paris. People did not know what to do.
Some people waited on trains. They went back to London. Drivers waited for many hours.
This problem made people sad. Holiday plans were not good. Families missed things.
On Wednesday, the tunnel opened. But some trains still stopped. People can change tickets.