Covert Human Intelligence Sources (Criminal Conduct) Bill

From listening to the arguments that have been made, it strikes me that the Bill is presumably intended to protect undercover officers from facing prosecution in a situation where they should not, because they are doing their work. More experienced Members might be able to give me examples of situations where officers have faced prosecution in those circumstances, but I certainly cannot think of any. A few weeks ago, during our debate on the Overseas Operations (Service Personnel and Veterans) Bill, we were told about ambulance-chasing lawyers, and I am wondering whether we will now hear about police-chasing prosecution services.