I had the 24hr ABPM as well. We've both got white coat hypertension. I just bit the bullet and paid up for the private tests. If id waited for the NHS I'd still be waiting for the monitor to become available. There was like a 3 month waiting list, and I didn't want my application thrown out.
The gp notes I spent about 3 weeks trying to explain what it was I needed from them. Once they finally understood, they realized it wasn't actually that big a deal and got on with it. It had all the consultant notes as well, because mine was about grommits I had and the subsequent operation to get one removed.
Going for pilot mate, like the rest of the world! Gotta try though, chasing the dream.