Boltar writes
More than likely. It took them 3 years to sort out all the escalators
at Holborn. Considering it took far less time than that to originally
build the station including installing the escalators you can only
laugh at the absurdity of it all.

It's often the case that building something is a lot quicker than
dismantling and replacing parts of it.

If the factory can build a car from scratch on less than an hour - why
is it that the garage takes two days to replace the engine?

--
Dave