Security was a bit overzealous. I came in to get some allergy meds and also wanted to get some cups real quick. At checkout, I purchased some Lemsip tabs, and I took three of the small Costa cups and asked the cashier present if it was OK to take them, and he said it was fine. As I was walking to the exit, the security guard told me he would let me take the cups this time, but next time I cannot. Again, the cashier told me it was OK to take these items, but I was told off by the security guard present. I've been to this Tesco numerous times over the years, and I've not had an incident like this. I am confused by this interaction, and I really don't feel comfortable going to this Tesco anymore. Happily, there are others around as well as alternative stores.