And it's quite a long way to go from Huddersfield to Chesire to use a computer, I was under the impression that they have computers on the wrong side of the Pennines as well (no offence to anyone from the White Rose county, just a little joke!).

That'll be the external IP address of the main firewall. Normally located in the same building / complex as all the clients, though they may all have VPNs (virtual private networks) to a central point, and hide behind that external interface...

Go to www.dnsstuff.com and put the IP address into the "WhoIS lookup" field.

signol [works in network support :) ]

Thanks for that "signol"
I've no intention of carrying out a witchhunt but just for curiosity I did try what you suggested and it said that I needed to subscribe to use the facility.

I don’t know anyone else who uses this forum. I won’t really describe myself as a train enthusiast but more of a rail user who cares. I live in Huddersfield but my girlfriend is a student from Frodsham, Cheshire who is studying at Huddersfield university who doesn’t have the Internet at her home address. Consequently, I sometimes use the Internet in her local library, which incidentally is where I’m accessing it from today. Although I can’t remember if I’ve posted on this forum while in Frodsham Library before.

As for knowing about the Chester to Manchester via Altrincham line, I don’t. Although some of the places on it such as Manchester Piccadilly, Stockport and Chester are obviously on other lines as well.