Richard J. wrote:
Why does it take 9 days to replace a double-track junction? Have there
been any recent replacements of similar junctions that have been done
over a weekend, for example?

The junction is in rather poor shape at the moment - while it is laid
with flatbottom rail, the sleepers are all wood and fishplates abound.
The chord to Acton Lane Junction used by the District is in exceedingly
bad shape (it's all bullhead rail!) and the chord to Bollo Lane
Junction suffers from a down line laid with wooden sleepers.

Drainage in the area of the junction is also rather bad - a short panel
between the trailing points of the junction and the trailing points of
the crossover was removed and relaid because of wet beds. The lack of
space under the overbridge probably also complicates matters.