On my plot of land there is a small wooden barn, stroke large shed perhaps 5 metres by 3. The external planked skin of another. Some corrugated tin roofing loads of old metal and 2 x VW campervans in a terrible state. Plus a couple of rotten out trailers, wheel barrow and that kind of stuff

 What is the best way to get rid of this much stuff please?

It will be more than one skips load for certain.

Try advertising the barn free locally to anybody who can dismantle it. I got loads of people wanting mine I couldn’t believe the interest. 
campervans might be good for parts I presume not the old ones with lots of windows they are still worth £ try a vw forum. 
I gave my tin sheets away advertised locally they are a compost bin now I believe. 
Metal can be weighed in, if you have enough sometimes they will come to you.

 

 

Somebody will pay for the camper vans. Same for the scrap metal.

why would you scrap a wheel barrow 😆

list most of it on Ebay / market place.

for the scrap metal just call up a local scrap man, ask on a local facebook group.

its not far off bonfire night if you have the space to burn all the scrap wood. if you have a load of untreated wood give it to someone with a wood burner.