We do it on a combined wage of about £55k. Fees are roughly £6k a year at present (year 1) on top of that uniform is very expensive, the blazer is £85, and ballet £45 a term, recorder the same, speech and drama the same, it all adds up.
Bursaries of up to around 25% are available.
There is a second hand uniform shop that helps lots too.
Holidays aren't much longer than state and holiday club is £20 a day.
When our 2nd starts nursery there in 3 months we are really going to struggle. We live in a small house, have an old car and don't go on holiday abroad (or if in UK we buy through last minute deals). All dc clothes come from ebay normally and you can get some beautiful clothes for a couple of £ on there.
The school isn't a 'posh' one though. All the parents there are things like probation officers, electrician, accountant, marketing managers, sky engineer etc.
Basically we don't live the lifestyle that you might expect from the wages we have and that's because all the cash goes on school fees. As they get more expensive we will think again at each step.
hth.