I buy a few branded items (not that many, I'm not known for my brand loyalty) but I've noticed that they are available 99% of the time in Home Bargains, Farm Foods etc for a fraction of the price that they usually cost in Tesco, Asda,Sainsbury:
Douwe Egbert's instant coffee - £6.50 in Tesco, always £3.99 in FF
Oral B Pro Expert toothpaste - up to £3.75 in Tesco, always £1.99 Home Bargains
Pom Bears £1.80 Tesco, £1 HBs
Nivea roll on deodorant min £2 Tesco, £1 HBs.
I'm sure there are more I buy but I'd love to hear of any other sneaky Bargains...