They have a problem keeping up with demand for the enlite sensors. If you are already a customer for the enlites then you can still order sensors. They are not accepting new customers for sensors currently. If your sensors are NHS funded I think that gets you bumped up the queue. The advice is to put in an order for sensors at least two weeks in advance, I would suggest adding a bit on to that, then call them again when you are down to last 2 sensors. They are getting sensor out, but slowly and you do need to get you order in in good time and keep in touch with them to find out what's going on with it, and let them know the urgency.