Thanks for the replies.
I’ve only just started working on OSM so I’m glad that I sorted this out early. Got on the bike this morning and I’ve made the start to gather the information the “old fashioned way”. I also made sure that no other such names/refs are used in other data that I added.
Is it the case that once the copyrighted data has been deleted then that’s the end of it?
Finally, although I glanced through the tutorial early on, I really was so keen to get started that I didn’t follow the link down into the easter egg page (from http://wiki.openstreetmap.org/wiki/Copyright)). It’s actually that page which gives a much clearer set of guidelines regarding copyright and I think that this information should be brought up to the higher level.
Cheers,
Richard