The CAA website (updated 3 days ago) shows that the oldest applications still being processed for NPPL 'flightcrew' are those received on 31 May 06. Which means they must be processing yours right now. Count 10 working days from the 31st and it should be in the post by that date.
I suspect the delays in may were due to all the bank holidays - these always slow things down at this time of year!