Aldi

The cheapest bottled water you can buy (42ltr for £1.16)! Aldi can be great for fruit and vegtables too depending on what super six offer is on i.e. recently they had 2.5kg maris piper potatoes for 39p. Carrots and brussel sprouts were also only 39p. Next month there will be another selection of six fruit and veg.
Although not the best selection of food, it pays sometimes to just have a look. Their sale was actually better than a lot of high street stores. A pair of suede leather gloves with cashmere lining for only £2.99 in the sale, and I managed to get a whole load of car accessories for less than a fiver each. The best buy was a digital tyre gauge which came with built in torch, a blade for cutting the seat belt, and a hammer for cracking the windows if need be — batteries included.
All my baking essentials are bought here too. Dr Oeteker piping icing for 49p — yes please! And cartoon character socks for only 99p for two pairs (they were marvel ones, or you could have hello kitty, minnie mouse, or homer simpson ones.
So the queues to pay can be a bit daunting on a Saturday so avoid peak times and go in the morning or mid morning. Not ever a bad as Asda though!