For comparison, our combined income is about 6,500 a month (net), our equity in the house about £230,000, the outstanding mortgage £270,000, and with the deal we are on this is about £1,200 a month -- leaving us with a similar £5,000/month after the mortgage comes out.
On paper, that's an incredible amount. In practice, because of other bills, council tax, electricity, car and what not, we have about £3000 in total bills. Leaving us with £2,000/month or £500/week for groceries, sports clubs, subscriptions, clothes (multiple kids), fuel, and holidays (2/3 modest ones a year). There are some months, notably around Christmas, that we are tight on money.