Marco
The public URL is correct. It was just the OData that was causing the issue. I looked in the BC manager and in the oData section there is a url. This was set as https://publicURL:7048/OData
I changed this to https://publicURL:7048/bc160 and restarted the nst. The web services show the change and a click brings up the xml response after logging in.
All is good now and thanks for pointing me in the right direction :-)