I was looking for stock for the Bloc sunglasses listed earlier, and noticed that when adding 2 items in the 'Buy 1 Get 1 Half Price' offer, I was only charged for the most expensive one at checkout. e.g. add 2 items for £29.99 each, but only charged £29.99. Some items are available in store only, others are available for Reserve & Collect, or home delivery (with a charge). You can check stock online. Definately works for the Bloc sunglasses (I ordered 2 pairs but was only charged for one, and my order is showing confirmed), but appears to work with the other items listed also. Also works on multiple orders i.e 2,4,6 items,etc
Update: Reports are coming in that orders are being honoured, so it did work. I'm glad some of you managed to take advantage of this in time. However, it looks like the sites been corrected and it's back to Buy 1 Get 1 Half Price again.