Neil Williams wrote:

Do they deliberately not use fixed platforms, like the farce at Euston
that results in the race every time a train is called?

Allegedly the "farce" you mention at Euston is deliberate, in case sets
need to be swapped for whatever reason. If the peak services "always"
departed from the same platforms, then it'd cause even more chaos if
they did need to swap a set out, as they'd have to get all of the
regulars off of the "wrong" platform.

At least that's what I was told by someone who used to work at Euston.

Cheers,

Barry