Fed up with HoHo buses?
Can't afford the Orient Express or the Jacobite steam train?
The DLR has just announced it is to start running special Private Tourist Trains from Tower Gateway to the Cutty Sark in Greenwich. With a tour guide on board providing commentry, called "DLR Discovery".
Info here: https://londonist.com/london/transport/you-can-now-discover-east-london-on-a-a-dlr-tourist-train
and here: https://londonblog.tfl.gov.uk/2018/07/23/dlr-discovery-explore-east-london/?cid=dlr-discovery
For those of you who don't know, the DLR (Docklands Light Railway) is a train system in east London, not part of the tube (but connects with it) that runs mostly on elevated tracks above ground level, and is driverless.