Tesco really annoy me when they increase prices to then put the product on special offer a few weeks later.
I suppose this underhand tactic must work for them; but I don't see how.
Fair enough if it's something like DFS, where you maybe get a new sofa every however many years and don't usually need one urgently - so they can pick a quieter month to offer them at the 'full' price and then heavily 'reduce' them ready for when people are actually buying.
But when it's food and household products that people need every week? Putting out a ridiculous 'behave yourself' price just makes you look like a very expensive place to shop, so people may respond by looking elsewhere for a cheaper shop and abandoning you for good when they find one.
And when you put the price back down again (with however much fanfare), it's just returned to the normal price - obviously not an actual bargain - so it's unlikely to get customers excited at all and view you as a good value shop, if they even register that they're supposed to think that they're getting a great price.
This is one of the advantages of Home Bargains and their ilk - obviously their prices have to change sometimes (upwards, most likely), but they don't tend to use underhand tactics like this.