It is possible to travel to Hanover, Germany by train from the UK. However, there are no direct routes and you may have to travel by several trains and transfers. Train services leaving London for Europe generally utilize the Eurostar and high-speed train networks.
The main path can be:
1. **From London to Brussels:** Take the Eurostar from London St Pancras International to Brussels Midi.
2. **From Brussels to Hannover:** From Brussels, you can travel to many cities in Germany by taking the International Train (IC) to Germany. Hannover could be one of your stops at this time.
You can travel to Hanover by train from London in a two-step journey. For detailed information about travel schedules and ticket reservations, we recommend checking the official website of each train company or travel agency. Travel times and routes may vary depending on the schedule, so it is important to check in advance.