Shed base advice

Hi there, i am looking at putting up my new 8x6 shed this week and want to lay it on 24x24" slabs that i have.

After checking out the condition of my garden, it seems the area i want to lay the slabs is mostly clay and sand which is rather easy to dig up. Previous occupiers had raised the ground to level as all the gardens in this road slope downwards. I've also had to remove a couple of railway sleepers and at least a tonne of pebbles.

Originally i was advised that a 50mm bed of sharp sand would suffice under the slabs as the ground is compact from the clay/sand (there's also a lot of large pebbles mixed in with it) but I did wonder if that would be good enough without a proper sub base.

Any thoughts would be great

This is how it looks so far


would this be manageable for a novice as myself or would i be better off getting someone in to do it

Could you not mix some sand in with the pebbles you removed and make a cheap concrete base or at least some sort of base to lay your slabs on, I would also look at getting some of the grids below to extend your shed base life if you have the budget.
These are pretty good
http://www.ebay.co.uk/itm/6-x-4-63-...080167?hash=item33aa097b27:g:CY8AAOSwKIpWBV-9

Leigh