You can lay pavers onto concrete Richard but they must also be laid on 50mm of sand. 100mm of concrete is the absolute minimum on a well compacted sub base with no soft spots. See our project on block paving. The better the preparation of the base, ie slopes etc, the easier it will be to lay the pavers.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!