It would be really helpful if you could please upload a couple of photos of the area, as that will give a clearer idea of what you’re working with.
From your description, it sounds like the paved section meets another level surface, so you’ll need a neat way of keeping the pavers in place without creating a trip hazard. A common solution is to dig a shallow trench along that 2.4m edge and install a treated pine border so that it sits buried in the ground and is flush with the surface of both the pavers and the adjoining area. This way, it acts as a retaining edge to keep the pavers secure, while still giving you a smooth transition between spaces.
I've created the below rendering to illustrate.
Please let me know if you have any questions.
Mitchell