The three women in the train carriage were all plain-clothed police officers. I knew this because I had been allocated the role of PhD supervisor for one of them. The woman in question, however, was unaware of this because she had not yet attended a supervision meeting. While the three of them discussed the doctoral study, I hesitated over whether or not to reveal my identity.
Then an announcement made over the train’s public address system welcomed members of the police force on-board. Now that the (supposed) cover of my travelling companions was blown, I felt obliged to reveal myself.
We all swapped business cards and complained about the unethical practices of rail companies.