Not quite a glitch but something you can easily take advantage of. The code GKHC9 at The Brilliant Gift Shop gives you three things: A free Polka Print Weekend Bag, 20% off and free delivery. You have to add something to your basket for this to work (I've tried removing the extra item from the basket after you've applied the code but it won't let you progress any further). The cheapest thing on their site is £2.50, 10 sheets of Christmas wrapping paper (or you could look for something else that you could use). Add this wrapping paper to your basket then apply code, 20% off brings it down to £2.00 and the free delivery takes off the £3.50 charge, and then the Polka Print Weekend Bag is added automatically. May not be the best bag ever but for £2 delivered to your front door you can't really go too wrong!
Polka Print Weekend Bag (& 10 Sheets Of Xmas Wrapping Paper) For £2.00 Delivered From The Brilliant Gift Shop