When I started playing GWE today I chose service 3P51: the Class 166 move from Reading TMD to Reading. Upon arrival in Reading I opened and closed the doors as per the instructions, the game confirmed to me that I had completed the service successfully. In Reading, the train forms service 2P51 (the 13:18 from Reading to Paddington) which I wanted to be driven by the game's AI. When I walked to the other cab I noticed that the cab door on the non-platform side was open, which I closed. After spending a few minutes in Reading the train got into motion, but it looks like it doesn't have a driver: