Thanks guys, Yeah, I've just been reading through it all. It does sound very interesting. Graeme, do you use it with a pump or pen? I'm struggling a little to work out why essentially removing a small transmitter and receiver set up and swapping it to a flash reader or bluetooth device and using an interstitial sensor saves the initial financial outlay required by CGM systems? I think I understand the difference between CGM and this Flash GM method now. But is that £600-£700 cost required by the CGM units still justified now? Thanks so much for your experience and views. Step.