Bradstone circles - Foundations

[Dave_A]

Hi. I want to lay a Bradstone Circle (2.4 metres dia) in my lawn adjacent the herbatious border and about 2 metres from my neighbours leylandii hedge. The soil is a light sandy loam, free draining over a lens of compact pebbles.
Bradstone recommend digging out 150mm, laying 75mm of concrete on hardcore and setting the slabs on 25mm mortar. This seems excessive for a lightly used sitting area.
Can you recommend an alternative foundation? ???

[lutonlagerlout]

dig out 150 mm lay 100mm of MOT stone,wack it and bed slabs directly onto 40 -50 mm or 10:1 flooring sand/cement mix
if a jobs is worth doing do it right
cheers LLL