To be honest we are in a similar situation, joint income of about £55k but we live in the most expensive city to live in in England (not London as we don't get the London waiting etc!!). Rent is £1400 for a basic 3 bed, I have a 17 year old ds and a six year old daughter and have to use wrap around care for the youngest at school which costs £60 a week just to work full time. Holidays are a nightmare and childcare for that costs around £160 a week.
We have no family near us and so cannot use them, and we have a night out once a year when we visit grandparents....
Council tax £150 a month, gas and electric £80 a month, water £45, car permit for at home is £60 a year, car tax and insurance for a £500 car is £60 a month, petrol £100 a month, bus fares for all around £40-60 a month, groceries to include special food as youngest has allergies is around £400-500 a month.... Mobiles (x3) broadband, Virgin tv and Netflix comes to about £140 a month total....
I feel extravagant paying £27 a month for dds swim lessons plus £30 a term for beavers and £50 a term for dance lessons but to be honest she is a bit hyperactive and these help provide routine and discipline
We can't afford to save for a house deposit, a new car or holidays but we manage day to day, wouldn't cope with an unexpected bill though and it's so frustrating that so much of our income has to go on housing and childcare!!
Looking at someone income alone is not enough to make judgements like some people have.....