NGMsGhost wrote on Oct 5
th, 2007 at 6:57pm:
Ofcom [...] have done nothing whatsoever to promote or explain the launch of the 03 access code to the general public or the call centre industry.
But of course, there is a whole section on London numbers starting 3. See
here. Note that this is in the under the heading "Information for Telecommunications Industry".
Ofcom has apparently given up on the "User's Guide to Telephone Numbering" (discussed
here), which also, bizarrely was also under "Information for Telecommunications Industry".