"World of Colour" emulsion paint at Focus DIY - 2.5 litres at £5.59 - matt or silk - in store only £5.40
Their range of emulsion is quite good in my opinion, expect others will disagree.
Fair range of colours locally and good stock, though white is more expensive by 80p.
Also available in 5litres at £8.80
It was reduced to half price prior to the closing down discounts, which is 20% off paint, the price now making it well worth considering for the DIY'er.
Unable to upload an image but it is a standard tin of paint!