We bought a couple of plastic cement moulds online - one for the pathway and one for the edging.
Step by step:
Clear and level the pathway and put the mould in place.
Mix cement, sand and gravel with water in the wheelbarrow.
Fill the mould.
John also added some cement colouring to give a more natural look.
Wait a few minutes then remove the mould.
Smooth off any rough edges, and wait for your cement to set.
Fill in between the gaps. John used deco (decomposed granite)