Re Cary's response above - CC has automatically inserted 'charset-us-ascii' in the web page that gives me a problem. I've changed it as you suggested and it seems to work fine. The editor still changes £ to £ but it displays correctly on the live page.
Incidentally, the character does change when I switch from code to visual editor.
On a similar vein - on closer examination CC does set up a new page with the charset = utf-8, but I note that some of my older pages, written using versions of the editor some time ago have the charset = unicode. Is there somewhere to set a default?
Thanks for all the responses!
You could try £
for the pound sign.
Not sure if it will work for you but works OK for me in the UK
Yorkshire
England
Old Rishworthians Rugby Union Football club http://www.orrufc.co.uk
Tuxedo Junction Yorkshire Function Band http://www.riley-tuxedojunction.co.uk
The Commons Guest House http://www.thecommons-guesthouse.co.uk
all created with Coffee Cup html editor