I had a similar condition to yours diagnosed at the age of 50 after a very stressful year at work. Like you I had a string of "abnormal but acceptable" ECGs prior to being tempoarily grounded by extremely high blood pressure. I wish you luck in the future and know nothing of any new procedures for Medical Boards. When I actually got to the board I found the doctors sympathetic and wound up with an A3G3Z1 Cat which let me fly as or with a copilot. However, I had to fight the ineptitude of medical admin staff both at Station and Command level at every stage to get the necessary specialist appointments at Peterborough and had resort to letters from my Sqn Cdr to the Stn Commander and Command Medical Officer to resolve the issue. It took nearly 2 years! When it came to the Med Board despite a clear requirement that I should be provided with an advisor of my own branch from PMA to advise on career/posting implications none was present. The pesident of the Board gave me the option of returning at a later date but I elected to go ahead as I wanted to get the issue resolved. I returned to flying and left the RAF 3 months before my 60th birthday after a very happy
5 years flying Nimrod R1 as FTRS. If the Board try to confine you to "Base Areas" ask them for the caveat "Waiver Permitted" This allows you to deploy to places without major medical facilities on a det by det basis after consulting your SMO. PM if you want more. Good Luck - Persevere - It's worth it!!!