Just been to Tesco Home Plus in Denton Manchester and picked 2 of these up. Usual price is over £10.00, I picked these up at £2.50 per 5 LTR bottle. They seem to have a Simoniz product promotion on at the moment and the prices of everything seems to have been slashed.
This is a great general pressure washer detergent for everything around the home and cars.
Worth ringing your local branch before making the journey.