These are great for making gravies and sauces richer. There were some mentioned a few days ago in Home Bargains at 19p! But I don't have one of those near me. They are normally about £2.20, currently showing at £2.12 in Tesco.
I know this isn't going to set the world alight, but I like to stock up (geddit) when they are cheap and there may be others out there that like to do the same.
Online they are also £2.12 in Waitrose so I don't know if this is in Colchester only. Receipt provided if you ask.