I got one from B&Q a few years ago when i worked in B&Q and got 20% discount on it. One thing i found out tho is B&Q apparently get karcher to number the models differently.

I found this out cause i went to my local karcher dealer as i burst the hose and had to get a new one and he couldnt find the model i had and he rang karcher and they said its exact same as this model just numbered different for B&Q. Its good pressure out of it.

My friend has that big one that is heated which is a really good power washer but its quite expensive just to wash your car once a week with. Good for if your cleaning oily engines and gearbox's mind you

If you go to the karcher website you can find one you like and click buy online and it shows you all the shops like argos etc that sell it and you can either purchase online or then go into argos etc