If youre travelling on the London Overground, brace yourself for severe delays.
It comes after a signal fault at Canonbury which is hampering travel on some stretches of the Overground network.
There are severe delays between Stratford, Clapham Junction and Richmond due to the fault that Network Rail engineers are repairing.
Fortunately, all other Overground lines have good service, the latest TfL travel status update shows.
Meanwhile, the M6 has reopened after it was partially blocked following a crash near Rayhall, West Midlands.
In the Selby area, Hull Trains and LNER services will face delays all week after a points failure, including their trains to and from London Kings Cross.