Anything from £0 to £600/£700 a month or more if the moment arises.
Depends on a range of factors. Being a single man who doesn't have extravagant tastes in anything I can enjoy this as much or as little as I like. I work hard in my personal life, it might seem like a lot of money but when you speak to guys at work and friends who spend money on golf, cars, drinking and football it all amounts to the same.