Try asking them. I know that a few years ago there was a proposal to permit instrument approaches at airports with a FISO but I don't know what happened to the idea. The details used to be on the CAA website - but no longer. The website says you'll have to use a FOI request to find out more info. Spoke to a lady in the ATS department a while back who was dealing with it all but it didn't sound like there was much progress.