good for you! in my experience, and this is with different government departments so might not translate directly to DoH/NHS, it will really help them if you can offer some sort of alternative suggestions for things that will help to address the problem they are trying to adress by using ORCON (I don't really know what that is though!). I would also suggest putting something into writing that will help them demonstrate that the system costs more than it benefits and then they will have something that they can put to their economists and whatnot and bosses to be reconsidered if they are already starting to have doubts of their own - I'd be very surprised if they had not already consulted though and decided the benefits outweigh the costs however, so you'd need a robust case and to show them new evidence. If you had time and you really wanted to tackle it, maybe a look at the impact assessment or whatever they use to make their decisions and/or an FOI request seeking information on how the decision to use ORCON was made might help you to understand where you need to start to make the case.