SWMBO has bought a good quality 8x6 shed so now I have the task of
making the base and erecting the shed.
The most obvious ways to do it is either a 3-4" slab or to make-up a
wooden frame and support it on 6 or 8 posts. One way needs a lot of
concrete and the other needs a lot of messing about and quite a lot of
timber.
I'm wondering about casting two 6" wide concrete beams about 4ft apart
and 8ft long, then fixing treated 4x2s across them and sitting the shed
on top. Has anyone tried this?

Are there any other alternatives apart from just sitting it on slabs?