i may be wrong but as i understood it,, after being absent from uk for over 3 months you are not entitled to free national health services, no matter how many years you have lived and worked in uk previously,, this is correct.
but i also believe that on returning, provided that you have returned permanantly to stay, on these grounds you will be treated as any other new imigrant,and once a nat ins number is succesfully applied and given ,only then are you entitled to nhs free treatment,
i have heard of an x pat returning once a year and had no problems,he proberbly never declared he had been living abroad
as you have no medical problems,,,, i advice you get travel insurance that will cover you for any such circumstance you may become ill while travelling
