I think NI has different guidelines from England, along with Wales and Scotland, not sure they're guided by NICE, although "guided" is probably an overstatement since PCTs seem to make up their own minds about treatment strategies.
Back to the OP, I am keeping my fingers (and everything else) crossed today, as the Exceptional Funding panel meet to consider my appeal to their original decision which was a "no" to CGM. Good vibes and positive thoughts everyone!