RMT: Jubilee line pretty much closed due to signal failure affecting three quarters of a million passengers. @itvlondon
RMT's Bob Crow: Breakdown once again raises serious questions about the automated operating system on that service. @itvlondon
More top news
Commuters could be caught out by the alterations which will see many existing trains leaving stations up to two minutes early.
Dog walkers in Richmond, south west London, will now be limited to walking four dogs at a time.
The pictures, which have not been made public before show the devastation caused after the IRA truck bomb exploded.