[noshed]

That looks bigger than my flat

[stompy]

Buy pre treated 4x4 fence posts to use as floor bearers.

They are guarenteed to last 10 years when fully exposed to the elements.

Also buy/aquire some concrete blocks and set the base onto them.
Thats how i've done mine and i moved my shed last year after being down for 8 years and it's still like new as it's protected..

I once heard a shed builder (friend of mine) say that people who set their sheds directly onto the ground are the people that keep him in business