Found at wilkos Market Drayton Shropshire not sure about nationwide. other items available at a reduced price too.
Car plan Blue star bottle spray reduced from £1.50 to 37p
Car plan Blue star anti-freeze and coolant reduced from £2.50 to 62p
Car plan pre-icer 'night before' spray reduced from £3 to 75p
Bluecol ice scraper reduced from £2 to 50p
Carplan card size scraper reduced from 75p to 18p
I do have images of the above but unable to upload