This document is http://videdot.com/old/listings.html
Videdot will expect an XML feed of programme listings. It may well be that we will provide that feed from here - in the absence of any other appropriate service. It makes sense, then, to begin with an overview of the existing online listings services. (Write-ups of the services will follow in short order).
There are also providers of information to industry (on which these sites are likely built) such as the PA.