From what I can gather they've mucked up some of the signals west of Central station. They had relaid the eastern approach, so maybe over the bank holiday weekend they've replaced the other side?
No, as I posted earlier this weekends work was 'just'
the switchover from the old interlocking to the new. They've replaced the original
SSI▸ with Alstom Smartlock, but reusing all the existing trackside interfaces.
AIUI▸ the
S&C▸ replacement at the east end was coincidental, as they've been installing the new interlocking for many months - a press release on the Signalling Solutions website explains that the first work was done in Dec 2009...
The current diversions and cancellations showing on
NR» LDBs definitely point to a signal or points problem west of Central though.
Paul