If I just had the house to run, it would break down like this.

Mortgage £480.
Gas £30
Leccy £30
Water £22
Shopping £150-£200
Council Tax £80
Phone £10

Would leave me with £300 let out of my monthly take home, if i had NO other loans etc.

I do own the house, i just dont pay the council tax or the shopping as i dont live there right now lol.