@jarhead I have solved my Problems! I deleted everthing and started again several times! I have documented everything I did. Since it is a Word Document I've uploaded it to Dropbox, in case anyone is interrested here DropBox
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Essentially I discovered that when I set up pfSense it connected to the DHCP Server in my ISP's Modem and gave it an IP Address on my WAN. I could not see why this needed changing so I left it alone and did not try to give it a static IP Address.
I also think that when I had been asked during the pfSense installation process, when I was asked whether I wanted to enable a HTTP connection for WebConfigurator, I had answered "n", thinking that the alterantive would be HTTPS. This time I answered "y", and low and belhold I can now get into the WebConfigurator!
Anyway, everything is now going and I no-longer have problems.