How flipping much!!!

Have used a company which I think is franchised nationally.
Try googling Chem-dry.

That's shocking! My (large) living room costs about £50.

That seems a rather silly quote, we had to have the carpets cleaned in our smallish rental flat as the tenant had chain smoked for 18 months . two rooms about 10 x 12 feet each, no furniture, but cost £100.00. Ring around for quotes.

Do they clean carpets?

Indeed you could buy one rather than hire at that price!

Is it possible to get more quotes?

I was going to suggest the same thing as Hilda.

It would be cheaper to buy one of those V*x steam cleaners and DIY!

Where I work they wanted the carpet in the staff dining room cleaned. The cleaning firm I work for does not have the equipment so our supervisor suggested hiring a carpet washer from Rug Doctor. My DH did so, and washed the carpet. (It's actually ancient carpet tiles). It wasn't too expensive, and handy as you can hire them from Tesco. It might be worth having a look, if you think you can manage doing it yourself.