[Nobbylad]

Lift all existing paving, excavate to at least 400mm. Fill with 300mm crusher run, in 100mm courses, using a vibrating plate for each course. Bind with at least 25mm grit sand, using vibrating plate. Lay further 75mm grit sand and screed to level. Re-lay paving and use vibrating plate with rubber cover to 'bed' down. Fill joints with kiln dried sand or dry sand/cement (4:1), brushed in.

Or just lift the wobbly ones and put some grit sand down to level them off.