The Co-op probably is not the first place we think of looking to buy a pressure washer, but in their latest in store magazine there is a 10% discount code for The Co-operative Electrical shop.
This is an on-line only offer giving 10% off pressure washers. The code can also be used on purchases of vacuum cleaners and steam cleaners.
To claim the discount you need the promotion code FOOD13 which is valid until 24th of December 2013.
Co-operative Electrical seem to only stock Karcher pressure washers at the time of writing.