Thanks for the replies.
Had a go at changing the resolution but still was not perfect, so I have changed it back to the original settings.
I shall have a go at swaping back to the old CRT tomorrow.
Yes it was a cheapie Vizitron L5AK6 £189.
Spoke to Office World and they were very helpful, willing to swap it but they do not do them anymore. Spoke to Vizitron in Germany and they appear to be happy to change it so if it truly is purly a monitor problem (see above) I shall get back to them.
Thanks again.