The third tasting article in this week's retailer collection comprises notes on many of the wines Marks & Spencer chose to show off to wine media six weeks ago. See our  guide to who's selling what  for full details of how to take full advantage of our reviews, including how to find the relevant wines where you live. Tomorrow - Jascots. The wines were, as usual, very competent - though note that when it comes to fine wine, M&S prices can sometimes be bettered by much smaller independents. I call as witness the delicious Rapet white burgundy. On Saturday I will reveal the much lower price offered by Domaine Direct....