extra strength screenwash concentrated 1 litre summer and winter formula. Purchased at the Halifax store, West Yorkshire. Was £1.60 now £0.80
effective down to -22 degrees celcius undiluted
Update: may have dropped in price to 40p for the 1 litre and 75p for the 2 litre (or 2.5ltre) bottle. Win win as this is good stuff !