OK, I started this thread and a right can of worms it turned out to be for a non-techie like me.

Fortunately I am not trying to post on the net, just produce a fair copy document for printing, framing and presentation.

So if I can download a font which has got the flat symbol in it, I should be able to print with it, right ?

Thanks for everyone's help, and don't stop, it's all fascinating.