TShirt,
As you have menetioned the lower flow rates will enhance the recovery rates and this presses to how the P1, 2 will be factored and whether they use the current extraction rates or stay at the 11-13% recovery rates that NEN have used previously.
For me, I would take 5,600bopd every day of the week, it has a nice ring to it!!
I will F/U and see if I can get an indcation as to what rate they will use when they get to releasing the P1,2.