I know this was posted over a month ago, but this deal is now on again in-store. Can't find it online at the moment, but they had been out-of-stock for a while. Definately had plenty in-store at this price today (Tesco Extra Beaumont Leys, Leicester). I know that not everyone likes this stuff, but at 25p a bottle its excellent value for those who do.
Only the Orange variant is at this low price.