Hi London36_I was told by my GP that I had to change my monitor to the one they recommended. I refused to do so and they booked me an appointment to see their Pharmacist. He said I clearly knew what I was talking about and he would "Pur forward an argument in my favour" to the GP's. I haven't heard anything since but have continued to order (and receive) my test cassettes as appropriate.
Stick to your guns!