Functional bikes. Not Porn not Anti

No thats a valid point, the problem is that the closure straps are also used to hold the bag down

http://www.skullbikeclub.com/news/wp-content/uploads/2012/09/photo-2-1024x768.jpg

They're just too fiddly to put at the back and also they'd be a nightmare to open on the move

Makes sense. Either way it's a charming colour.

Out of curiosity how often do you want to access the inside on the move? Would some sort of small pocket accessible from the rider's side be enough. I was just thinking about something like the Brompton touring bag that has little pocket flaps on the back.