If any of you in the Uk have a B&M store close by then check it out, I called in today and picked up 2 x 420g jars of ground white pepper @ £1.99 each, plus a 155g jar of dried red chillies for 99p. They are dated until 10/15 so have a good shelf life. This is the cheapest GWP that I have ever come across, so consider it a really good bargain ! They also have a good selection of beers.
This shop seems to pick up either short dated or discontinued products so is always worth a call in. Oh, I also picked up a 110g tub of powdered arrowroot for 10p (dated July 2015).