What I understand from justin44's posts are that his problem was detected at a full check-up (private?) and he has been referred to a consultant. I presume that the doctor responsible for the check-up has already given him advice on life-style, diet etc. The consultant will be able give him more detailed information about cause, prognosis, treatment options etc. The only doubt I have is going away (flying, I presume) for "two weeks in the Maldives" before seeing the consultant. I'd ask advice about that, but he may already have done so.
Just a little background about my experience. The GP told me my BP was borderline high and offered me the opportunity to start medication. I chose not to take drugs for the rest of my life and lost a stone and a half in weight. A couple of years later I had a major heart attack, an out of hospital cardiac arrest, was fitted with 4 stents...and survived because my treatment (NHS) was swift and the best. I was lucky. Looking back on it I should have started the medication when it was first offered.