"Halfords Advanced Professional 33 Piece Ratchet Spanner Set
Consists of the following sizes
1/4 bit adaptor & 20 assorted bits"
Halfords professional tools are excellent quality with a lifetime replacement warranty.
I have a set of these, albeit with swivel heads and they're one of my best tool purchases.
IMHO they're worth the investment at this price.
 Halford's ratchet spanners (AFAIK) are NOT covered by their lifetime replacement warranty, at least that's what I read instore a couple of years ago.
My first deal, be nice ! :)