The best way to make contact with me is email. I am not connected to it 24 hours a day like some people, but I will probably see an email before I get a phone message.
If you want to take your chance as to whether I am in the office or not when you ring, you can try +44 (0)1278 760188, where there is voicemail that I will eventually get to.
I could give you my mobile number, but it spends 99% of the time switched off, so there is not much point.
If you want to send a fax, you can use +44 (0)8721 106177 which will actually get delivered to me as an email, so I can receive it while I am traveling.
Finally if you want to use that old fashioned postal service :-