The NHS is indeed free, but I was not referring to treatment by the NHS. If you are adult with slipped disc, torn muscle or hernia or other no serious issues then good luck trying to be treated on the NHS. The waiting list is usually two or three years. I was referring to the numerous private hospitals existing in London, where you can see a health specialist within days (it sounds like a luxury in britian, but really is the norm in most countries even heavy sanctioned ones like Cuba and Iran)