I decided that although I use my router regularly, I don't do anything complicated, so a simple router table that can be packed away after use is ideal.
I have taken an idea from 'poroldchap' on Youtube, and made a couple of small changes.
The whole unit only comprises of a hardwood base, with another piece attached underneath to fit in the vise, and a 3/4" plywood fence/vertical table, I bought a hardwood stair tread 12" x 30" ( I'm not sure what timber it is, but the sawdust was a killer. It ended up at 12 x 27), and the plywood, I recycled from my previous version.
I won't go through the actual build, because it is self explanatory, but here is what I now have, it just needs tidying up. (I apologise for the photo quality, my vice is immediately inside my workshop door, and the sun has been cracking the flags...again!)