You are unlikely to get NHS funded cgm unless you are losing/have lost hypo symptoms.
You say your diabetes is well controlled, so how come your HbA1c is so high?
Are you carb counting? If not, ask to go on a DAFNE course as this would help tremendously.
Have you basal tested and made any appropriate adjustments?
Is it just the stress that's affecting your BGs?
Has the clinic suggested using a pump?
A bit more information will help us to help you. Has your DSN suggested anything?