Here is an interesting little deal from the BAA WorldPoints website (need to log-in and look under Member Offers).
Free delivery on purchases over £300 & 100 extra points
We’re offering WorldPoints members free delivery on all purchases made at Heathrow over £300 to all mainland UK addresses when using the Shop and Collect service. Use the service by 30th December 2012 and you will receive 100 extra points.
Now, I admit that not many of us spend £300 (in one transaction, when you see the small print) – although my wife has done it!
If you do, though, you now have to decide. Should you take your shopping with you, or do you entrust it to BAA to wrap, pack and deliver to your home within a couple of days?
Personally, I don’t think I’d bother – although this is a good service if you want to buy something large in duty free and don’t want to drag it off on your trip.