I have that same bag in green but I use mine for a handle bar bag.And I have the Super C Panniers as well both front and rear they sure do hold a lot of stuff.
England sure knows how to make touring stuff guess that why I also have a brooks B17 Saddle in green too.They should last longer than I do out on the road lol.
The Pendle bag is great little bag I think.Sure works good as a handle bar bag.