Building Curved steps

[pls]

I want to build some curved steps in the garden on a slope which is currently just a flower bed. What are the best ways to construct this. The steps will be quite wide (3-4m wide) with a tread of approx 1m and there will be approx 3-4 steps. I plan to cut paving stone to use on the surface, I just need to know the correct way to construct the base. I was thinking of using plywood formers (to create the curve) and concrete fill but is this overkill?

[Owain]

That's the way to do it IMHO if you want it to last. Chuck in some rebar as well. Pretend the vase the M-i-L gave you is a time capsule and bury that under the concrete.

You can get semi-rigid plastic sheet for making formwork in earth, which may be easier than cutting ply.

Wobbly steps are dangerous.

Owain

[John Rumm]