Well, as an Emeritus Professor, I am no longer so regularly in King's College so, frankly, it may sometimes be rather difficult to find me.
Best plan is to send me an e-mail message. My email address is TonyDavies@ieee.org.
Although Emeritus Professors in Engineering at King's College occupy zero space, you may still be able to locate me at the Centre for Telecommunications Research
I also have a shared office in the Sopwith Building of Kingston University http://cism.kingston.ac.uk/dirc/home.htm and http://cism.kingston.ac.uk/.