Most of us face petty frustrations like post office queues, parking tickets and automated phone lines. Most of us just grin and bear it - but not Bob Howard and Bob Johnstone. They've taken action. They send ludicrous invoices to anyone and everyone they think deserves them. The responses they receive - from Ikea and Southern Railway to the Archbishop of Canterbury - range from the incredulous and bemused to the good humoured and witty. Initially, the two Bobs started invoicing people just to make themselves laugh - but soon realised it was too funny to be kept to themselves. For anyone who's...