Do not forget your rain gear, wellington boots, hat, gloves etc. It's cold over here mate, you won't find any jelly fish on the beach though, just a bit of sewage sometimes.
Wild camping is possible here but you have to plan ahead, you can have a look around this website when you have planned your trip. It will be best to do at least some planning, (I know this is hard for you but you can't just head off into the bush as we havn't got any and anyway someone owns every little bit of green space,) you will need to plan.
Go to London and get out as soon as you can, it's a dirty expensive and very crowded place. Head for places like Stratford on Avon, Shropshire, York, Bath, Yorkshire, in fact anywhere but London.
You will find we have something called "park and ride" just outside most cities, they are car parks with a bus into town. Use these as you will find parking impossible.
Do not speed, the Police delight in using speed cameras everywhere and you WILL get caught.
PM me if you want to stay in Worcestershire, you can stay on my drive, I will let you have electric for free as well!
As regards buying a campervan over here, it would be best to look up a few dealers around where you will be first of all and let them know how much you want to spend. Then you will need a UK resident to buy it for you, you can then drive it legally after you have got UK
insurance.
Join the Caravan and Camping Club or the Caravan Club, both have thousands of small farm sites that cost as little as £3 a night. There will be few facilities but you will often have the field to yourself, a tap and toilet cassette empty point. I use them often, it is a good way to move slowly around away from the hustle and bustle of our overcrowded cities.
You will be considered to be a New Zealander by your obvious N.Z. accent, it's probably easier to say you come from the South Island or something, as they probably won't believe you.
You will need to study the language a bit, for instance:- Fart means gas out of your bottom. Bugger is a term of endearment, "you old bugger" means you have a life long friend. Fag is a cigarette. Fosters is a men's clothing chain store. And many more.
Beer is always served warm, we have special warming fridges to keep it so, so if you want cold lager like what you drink you have to buy it in cans (not tinnies) and cool it yourself.
We have no poisonous spiders but we do have one poisonous snake, the Adder, but don't worry, we have destroyed so much of their habitat that only a few exist in protected areas. The ducks and swans can give a nasty peck if you forget to feed them bread and the seagulls are airborn bandits, they will attack without warning to steal anything edible. Chips (fries) are favourites, with salt and vinegar on.
Be careful when photoing the Houses of Parliament, Palace, River Thames or what ever, the Police don't like it and might arrest you and delete your photos. They might do £1000 of damage to your expensive camera as well, as happened to a professional friend of mine.
The days of the friendly British Bobby are gone, just keep out of their way and avoid eye contact.
Post again for anything you want to know, I am an expert, I have lived here for many many years.
Hallii