Mizter T wrote:

That said, it will become a far more critical bit of London's
transport infrastructure when it becomes part of the ELLX, so I guess
it's worth getting everything right first time round during this
closure and making sure all the works are done to a very high
standard.

But this isn't first time around! The ELL was closed for three years not
long ago, when conversion to third rail and use of NR rolling stock etc was
already inevitable.