Simon, I had a quick look at the link given by annodomini and I think you are in with a chance. Your remaining family live in the UK and you have spent most of your life in the country.
Why do you not contact the British High Commission in New Zealand, presumably in Wellington, possibly even visit them. They will be able to advise you on how you can return home and you may well be able to get copies of the forms and even fill them in and submit them through the High Commission.
The other factor that may help you when you get back is that Lincolnshire is an inexpensive (relatively speaking) place to buy property so rents may be lower too. Although as you are under retirement age you will be restricted to a one bed flat unless you pay the excess rent for a larger property. You will also be assessed by ATOS as to whether you are disabled enough to qualify for disability benefits or will only qualify for job seekers allowance.
Husband I think is looking for divorce after 50 years.
Noticed a new privacy pop-up? More info here...
My garden has been ruined by ????






