Why were enough Azumas not ordered to replace all the 91+MK4 sets?

[TT-ONR-NRN]

Obviously never boarded a Harrogate or Lincoln service and seen how busy they are?

All the more reason why using 5 cars is poor then.

 

[800001]

All the more reason why using 5 cars is poor then.

I Never said using 5 cars was good.
However if all 5 cars became 9 or 10 cars, then with all current services Kings Cross would become a nightmare to platform trains.

As currently 5 car sets from different operators shame same platforms, and multiple sets have to head to Bowes Park or Ferme Park just to clear platforms for other services