I'd do this too if my flippin' ballot papers would arrive!
We had some Lib Dem canvassers call just now and I asked if not getting postal voting papers was a common problem. She said yes, quite a problem around the whole country, because the post office didn't know the election would be happening at this time of year, or something. But they had as much warning as everyone else, surely? She suggested handing in the completed ballot in person, which is kinda what I'm planning to do anyway if it doesn't arrive *very* soon.