If you want these then please give me your postcode when you reply to the post.
They're about 20 years old, they're from Aldi and they've given me good service. They have built in rain covers which zip into a pocket underneath (see second picture) which are probably showerproof rather than waterproof but I've never had occasion to test them; and the straps are a bit frayed. The carrying handle on one of them is so frayed it's broken off (ringed in red on second picture). They hook onto a carrier (yellow rings in second picture) and are prevented from flapping (too much) by the velcro straps (outlined in orange). I've always used bungee cords as well (not supplied).
Pair of bicycle panniers (Withington M20)
This offer has been gifted to someone and is no longer available.