I gave away a double bag set a few days ago and got loads of replies, so maybe someone can use this single one.
You will need a pannier rack on your bike to use this. Dimensions : height 33cm x width 36.5cm x depth 13cm . A good size that you could fit files and laptop in for work, or use for shopping .
Single Pannier Bag for a Bike (Didsbury M20)
This offer has been gifted to someone and is no longer available.