i've got a 1.8m paving circle to lay in the garden,

any ideas on how much cement/sand i will need and what ratios to mix it ?

cheers
Ray

you need a mix of 8 to 1 to hold the edgings in place, then lay the rest on limestone grit or washed sand 2" depth on some compacted hard core. You'll only need about2 bags of sand and gravel and one bag of cement, which you will not need all so go somewhere you could get a part bag cheap.

Personally I'd lay all of it on a 4-1 mortar mix over the compacted grade 1 MOT (aka crusher run ). Use sand or grit and they WILL settle and sink. May take a while but they will.