Catch on PTS is that sometimes they dont actually add the points when the order is sent if it is not a first order, even if tesco.com allows the code to be used when the order is placed.

Worse catch is that this is VERY old news as this code is 6 weeks old and many of us may already have used / tried to use it in October, and have wasted our time trying to use it again not realising it is the same old code !