* To hold the politians and civil servants who made the train unprofitable.
* Make it into a tourist attraction (mmmm lovely views of tunnels, dirt, dust and shite)
* A luggage check in procedure for people using the Heathrow/Paddington Express
* A pub crawl
* Sell to Dr Evil so he can transport his henchmen to and from his underground lair
* With the four foot height limit, it is not suitable for commuter traffic, but it could perhaps be used to ferry parties of young children on school runs.