Most GPs won't do shared care now because the BMA say:
Please note policy passed at UK LMC Conference 2025, which stated that ‘any shared care prescribing arrangement with a private provider is unsafe, not enduring, and widens health inequalities, and demands that GPC UK adopts a firm position statement to reject this’.
https://www.bma.org.uk/advice-and-support/gp-practices/prescribing/prescribing-in-general-practice/principles-for-shared-care-prescribing
Basically, GPs were concerned that they could agree to shared care with a private provider, who could then cease care for a patient, leaving the GP responsible for the patient's care, rather than prescribing under the advice of the provider.
Right to Choose providers are able to diagnose and treat.
DD3 was diagnosed privately. GP refused shared care. I then approached CAMHS with her report. After checking out the psychiatrist and taking his report to panel, they decided it met NHS standards, the diagnosis was accepted, and she was added to the CAMHS medication waitlist. GP still refused shared care because she wasn't actively under CAMHS care. I was told it would be 54 weeks on the waiting list. At that point, CAMHS wrote to the GP saying 'We will be caring for DD3, please prescribe in the meantime." GP refused, saying that unless she was actually under their care, firm no. Finally, I asked CAMHS how to make a complaint, at which point they decided they they could prescribe after all. I had to drive over to the clinic to collect a prescription from them. Then they wrote to the GP surgery and said 'Now she's actually under our care. Will you prescribe?' GP agreed to prescribe.
It took about 4 months of phoning the GP, phoning CAMHS, phoning the GP, phoning CAMHS... It was really stressful and in the meantime I was paying over £200 per month for medication.
She's very young and the first things that will be recommended will be behavioural techniques and environmental modification. So you could try and look at those things whilst she's so little. If they work, great, if not, you'll be able to say 'This is what we've tried.'