Just spoke to a very helpful chap on the Gold Line and he explained that there has been work over the weekend doing Avios adjustments as requested by various suppliers. It would seem that any transaction that has in some way been queried by the purchaser can result in the supplier clawing back the Avios. In my case the Selfridges transaction was for 6 bottles of vintage champagne, the vintage I was sent was 2003 and not 2002 as ordered. I kept the bottles of bubbly sent, but they did send me a rather nice bottle of whisky as compensation. However, "helpful BAEC chap" has asked me to fax in the receipt to them and they will endeavour to get the Avios back. Another great thing about on-line shopping - it is so much easier to keep receipts!