Spotted today at ASDA Ventura Park nr Tamworth a bin full of these 25 disk spindles in both +R and -R varieties. Appeared to be from the Taiwan factory, but all marked at £3, which is the cheapest I have seen these yet. These are the standard disks with a non-printable surface.
No idea if this is a national deal, but ASDA offers tend to be.
 Checked with ASDA. This is ex-promo stock, previously marked up at £7 and now stores are clearing what stocks they have left. This price 'should' be hitting all stores that have any stocks left. As always, if you are making a journey for this, ring ahead first.