Revealing mistake: At the very start of the episode, when the SSS Esperanto is seen, the bubbles from the seabed are sinking rather than rising, revealing the piece of footage is being played backwards. (00:00:35)
Revealing mistake: During the car chase, the box Rimmer is sitting on keeps moving. (00:21:25)
Answer: It's Queen Victoria, someone any Englishman would recognize, and needed no introduction.