http://www.tfl.gov.uk/contact/13879.aspx

From today one can no longer dial a London number to get London travel
information, one has to dial the new 0843 222 1234 number - 0843 numbers of
course cost more, from a BT line that's 5p a minute (plus a "call set up
fee" aka connection fee of 10.9p), but the real sting is for those who call
from mobiles - e.g. from an O2 contract phone it will cost 20p/min, or an O2
PAYG phone it'll cost 25p/min. And UIVMM the 0843 number range is not
included within any inclusive allowances offered by any landline telco (BT,
Virgin, Talk Talk etc), let alone any offered by a mobile provider.

A regressive step, IMHO. One trusts that TfL will retain ownership of ABBey
1234 nonetheless (you never know, it could be put back into use in the
future). As of this morning if you call the 7222 1234 number you'll hear a
recorded message directing you to dial the new 0843 number.