Another welcome, AndyMac!
I love to tell my story to forum newcomers, because it's a very hopeful one.
At present, I'm 68 and living in Oregon (where it rains as much as in the UK, I believe). I was diagnosed 13 years ago but have had symptoms as far back as 18 years ago. With vigorous and consistent exercise plus a gradually increasing regimen of medications, I am still in the first stage of the disease, and my doctor says he sees no signs of advancement! I am still living my "normal" life and, since my husband's death over two years ago, managing my own household. I do have symptoms that I am aware of every day, but they are subtle and unnoticed by people in general.
I am glad that I started on medications early, especially those that studies indicate have the effect of delaying the disease. I cannot be sure which parts of my treatment have been the most successful, but I am positive that exercise is one of them because it always energises me and makes me feel better, stronger. Your active life will be an asset without any doubt.
I wish you well on this journey that we are reluctantly taking. This forum has been for me and most likely will be for you a great source of information and encouragement. There are some wonderful people participating here! Best regards, J