Thank you Snock for a very informative post. Can I just add that instead of having a leather strop stretched tight to wipe the blade on I use a stropping board. This is a piece of leather glued to a length of wood, mine is about 2" square and 8" long with the leather glued on one face. I hold the knife and wipe the strop along the edge. Same result as a pukka strop but I find it easier with this tool if the blade is a bit long.
Thanks again.

Just got back from Spain and bought myself a little darling of a knife there. A Muelay Colibri. Fixed 2 3/4" blade with a 3 1/4" Bone handle. with brass bolsters. It's worth going on their website and having a look at it.