I'm hoping to go on one over the summer - its available in our area (or within reach) as 5 separate days rather than 5 consecutive, but my dietitian thought it was more beneficial to do them consecutively if possible. (can't remember why - sorry!)
apparently the instructors have to do an extra bit of training to deliver the course 1 day a week over 5 weeks, they said that there may not be anyone in your area able to do that at the moment. It's probably worth asking for a consultant appointment to find out why they can't offer this at the moment? It's definitely well worth doing the course, it's great!