Wilko's in Hull have both DVD-R and DVD+RW in packs of 10 for £1.50
Its a bit odd, as their 25 packs were £8.10 instore of the same DVD.
So you get roughtly 55 for £8.10 if you buy the £1.50 packs.
I bought some and surprisingly decent quality.
They weren't discounted or in 'sale'. That the normal price !