In article ,
mark wrote:

Do I dig out a bed and lay the blocks direct on the ground or do I dig
out a rectangle and fill it with gravel and lay the blocks on this and
then put the bearers on top?

The former. Just level and compact the ground. And you can equally
well use el cheapo concrete slabs, surplus bricks or whatever instead
of blocks. It really doesn't matter.


Regards,
Nick Maclaren.