are you calling me a liar?? It is perfectly possible if you are in an organisation with a lot of staff working on reduced hours or where official headcount has been frozen for years despite workload increasing. I am currently in the process of trying to get a CID but won't know until later in the summer if it is successful.
Headcount, reduced hours etc. are irrelevant. Based on the information you have provided, you are already on CID by default.
A relative of mine works in a part of the PS where rolling contracts are the norm. Says her boss takes advantage of the fact that a lot of employees are ignorant of the law - would deliberately not tell them when they had acquired permanency. When she herself was offered CID, she got a long speach from the boss about how lucky she was, and how she should be thankful to him for doing this favour etc. etc. etc. and how she's lucky that she has a job etc.etc. even though she knew that he was legally required to do so as she'd exceeded the 4 year limit. He also doesnt formally present the CID contracts to some staff at all as he likes the idea that they think they are only temporary staff as this motivates them to work harder to acquire "permanency" that they already have. I'm told that this practice is common among management in this particular part of the PS - its likely that you work in this area.