Ortlieb Back Roller City Panniers Pair 40 Litres - £90.1 | Bags - Pannier | Cyclestore
Ortlieb City Rollers - The Ark Cycles Ltd
Ortlieb Sport-Roller Classic Orange QL2.1 Panniers – The Bicycle Store
If you're looking for front panniers/fork bags, I've used the Ortlieb 4.1L fork packs for quite a while now and made a review video that I hope will be helpful :) :
Ortlieb Back Roller Classic Panniers Review | Five Bag Fit