Your best bet is to have a word in consultant and DSN's ear without daughter knowing.
Then get them to sit down with her and have an adult talk.
Not give her the complications blurb all it does is make teenagers more rebelious.
Explain that bs readings are needed so that insulin can be altered to keep her healthy and also above all so that she can hold a driving license.
At 16 she can hold a moped licence but no control no licence.
A diabetic hormonal teenager

Good luck
