I am not sure what the Idac is. Is that en education course? Knowing how to do carb counting, which is taught on a T1 course, is essential to keeping levels good. If he has not been given an education course it is well worth asking for this. It is available on the NHS. Not sure what happens privately.
I am not sure how the private system works, but if the change in insulin prescription comes from there is that why is would have to be self funded? What alternative has been suggested and which is the one they suggest changing.
The two insulins that he is using should give him quite a bit of flexibility, especially if he splits his Levemir (basal) to morning and evening injections. The split Levemir gives him the chance to adjust his basal insuion during the day without needing to adjust the night time insulin.
Using the Libre can give information that enables a user to head off highs and lows, and also identify changes that could be made to food selections and to portions sizes. Has he been given any training about this? There are some excellent videos produced by abcd
https://abcd.care/dtn/education. They cover a lot of ways of improving time in range using the Libre and I wish I had had access to these when I started using the Libre
With regard to driving I understand his caution. When I have an appointment to which I need to drive, I now try to remember to check my level on Libre 45 minutes beforehand. The level along with the direction of travel arrow help me to make sensible choices about any carbs to take on board, to ensure that I am ready to safely drive when I need to.
A pump can make quite a difference even without the CGM. Combined with the information from the Libre it is possible to get a good HbA1c, and high level of time in range.
Come back with any more questions you have, and ask if anything above does not make sense.