We are tight-fisted compared to most, it seems. 
We are not far above the point at which they get the minimum maintanance loan.
Last year we gave DS1 £50 a week and have continued throughout the holidays. He was in part catered accommodation - not his choice but take it or leave it. 
I think he gets by on a lot less than he would have had access to if we were a low income family. This isn't a criticism, just a fact. There are obviously swings and roundabouts but we just cannot make up the difference from our earned income without selling the house - especially as DS2 is starting a 4 year course this September too. Luckily they will have graduated before it's DS3's turn.
DS1 had money for his birthday and Christmas and eventually after lots of trying, he got a couple of hours bar work in term time. This summer - again after lots of job searching - he's cleaning rooms in a budget hotel chain for a few hours a week (variable depending on bookings). He also sold tickets to event in the first term for a small comission.
He will start Year 2 with about £600 in his bank account, having bought himself £700 worth of computer stuff this summer and not touched his overdraft.
It seems he is a million miles better with money than me. I'm very glad of this. I often ask him to tell us if he's missing out on stuff because he can't afford it. He says he's not and I have to believe him. I worry though.
We took out a tiny endowment policy for DS1 and 2 when they were born. They are choosing not to use it for everyday expenses, just things like deposits on a house for Year 2 etc.
I am hoping to find a stock of magic MN chickens to send him off with in September. 