loft floor ventilation - continual from eaves to eaves ?

[colin2000]

Currently, we have the warm a living area in loft, where insulation is blocking gaps below the knee walls (so warm area floor is sealed off).
The plan is to convert cold storage areas to extended warm areas - for better comfortable temperature and dirt/dust control.
The concern is floor insulation ventilation air place:
Should I have continuous ventilation from one side of house to other, i.e. eaves to eaves
or
should I reintroduce the gap blocker/barrier at the new extended storage edge (i.e. I would now have a new sealed extra large warm area)

 

[Wayners]

I have a loft conversion.
Was a bungalow.
The floor is filled fully with rockwool.
Is open either end at eves but I don't think much air blows through, if any.

Don't know if this helps