Suspended timber flooring insulation. Vapour barrier?

[TheOneBrick]

Hi,

I did just like to check my plan for installing some insulation in a timber joisted suspended wooden floor in a 1900 ish terraced house.

My plan is to remove the floor boards using some scaffolding netting stapled between the joists (up and over, up and over) to hold some fibreglass insulation, clean out any excess rubble and double check the air bricks. I was originally going to put down a vapour barrier of polythene sheeting on top of the joists then replace the floor boards. As I understand it standard to place VB on the warm side of the insulation, but doing a quick google this link

http://www.superglass.co.uk/product_solutions/ground_floors/suspended_timber_floor/

"Vapour control layers are not normally required in insulated suspended timber ground floors. It is preferable to allow water vapour to diffuse freely through the floor to be dispersed by the ventilated void."

suggest NOT to use a VB when installing insulation on a suspended timber floor. So is the vapour barrier idea now wrong?