In an ideal world the bag would be leather, but in reality leather's a bit pricey and too heavy for my lazy bones to lug around .
Oilcloth would be good, but cutesy and oilcloth seem to be inseparable.
A4 messenger bag size/shape is probably what I'm after - or hobo bag style - needs to hold everyday crap and preferably have a few handy compartments. And cost less than £50. I'd be eternally grateful if anyone can point me towards this elusive holy grail.