On the subject of lake district, I am going to push for Italy again. Just google Lake Como, Lake Garda, etc. These are exceptional lakes to see, interesting places around the lakes to visit, waters that are wonderful to swim in, great food, etc. I still think that Italy offers a better retirement.
I also think you will live longer. People think Italian's live longer because of their diet, but I suspect it's related to their attitude towards prevention. Seems totally normal to get a full range of tests done every 6-12 months.
As example: I had private blood tests done that included everything I could think of (hormones, vitamin D, etc). I did not need to make an appointment and I paid 50 euros. I also had a full range of tests on my heart with a leading surgeon for 130 euros privately. You can use the system and pay less.