I agree that the NHS is great but only once they've diagnosed the problem. Getting the diagnosis can be a nightmare.
My OH (who'd never been to the GP for years), had numerous GP appointments over a 2 year period for various ailments which suddenly and randomly started. Including fainting, hyperventilating, various pains in different parts of his body, rib pain, headaches and nausea, etc. GP did a few simple tests such as BP, basic blood tests, ECG, etc., but eventually started to tell him it was just "we're all getting older" and basically fobbing him off. After some excrutiating rib pains (for no reason, i.e. no exercising, heavy lifting, falls, etc), he saw a locum GP who took her own different blood test (didn't want to wait for a nurse appointment a few days later) - result came back next day, and she phoned OH to say she'd arranged an oncology appt the following week. Turned out it was a blood cell cancer - when we looked it up, all the signs were there, but his "normal" GPs didn't put 2+2 together to realise what it was - too busy thinking it was just "normal" ageing! Once he got the diagnosis, the treatment started straight away and is working (incurable but treatable).
Same with FIL who, despite being a fit and healthy 69 year old, stagnated in a hospital ward for months because they couldn't diagnose what was wrong with him. All the symptoms were of a bowel blockage (he'd previously had an operation on his aorta so they thought it could be scar tissue from that blocking the bowel), but they did x-rays and scans and couldn't see anything, so they just left him on the ward, waiting, and just treating the symptoms, i.e. giving him liquid food, treating the hospital acquired infections, all the while he was getting weaker and weaker. There was a definite "waiting to die" sort of attitude from the doctors and nurses because they didn't know what was wrong. Eventually, after 2 or 3 months, they decided to open him up at the site of his aorta operation, and yes, there was a bowel blockage. Then they quickly rectified it, got him back on foods, etc., and eventually he was well enough to come home. So they got there in the end, and once they knew what it was, the treatment all came together, but if they'd left it any longer to open him up, it would have been too late.