I think I pay around £20 for a wash and cut - never exactly sure of the indvidual price, as I take my kids along too!
If you want to save a bit of money, as for a wash and cut without the blow-dry. I have naturally curly hair, and always used to hate the way that hairdressers dried my hair (I usually leave it to dry naturally, as it goes frizzy after blow-drying - I then tend to straighten it, these days), so it eventually occurred to me that it was silly to be paying for a blow-dry that I didn't even like!
As far as i'm aware, not having your hair dried takes about £10 off the price.
Jo x