I know that a lot of US insurance companies are just only starting to cover the integrated pump/sensors and or other CGMS, not just minimed, and they usually can only get the coverage, because a patient has to fight to say they have a hypo unawareness, seziures or other issues. Its too bad, because this is such an excellent tool, that even despite some of the drawbacks such as inaccuracies in the lower blood glucose ranges, or constant alarms, etc, it really helps a person with diabetes see their patterns and be able to adjust accordingly!
I am curious as to what you find out with the NHS regarding the sensors. I have heard some horror stories about getting children on pumps in the UK, so I would imagine the struggle for a CGMS would be even worse. As you're an adult though, it may be different.