DC both have funded their own time at university, they went to private schools but on bursaries and due to their dad no longer being around I could just no longer afford to support them fully sadly.
From me DC get a food shop (£100ish) at the start of each term and I'll probably buy around £75 worth of clothes for them a year.
First and second year they found it OK. They went to very academic schools, one actually told the boys not to get jobs during term time, but DS decided he could cope and balance his workload. They have both worked since 16 and put the majority of the money since they were 16 into a savings account which they couldn't touch until they were off to uni. At the time we talked to them about the fact uni if expensive and it might be a good idea to put a set amount of their weekly earnings into an account for uni. It was up to them if they followed our advice, but both did and it has been a huge help and makes the difference between being in the overdraft and keeping to an achievable budget.
They use their student finance maintenance loan on their accommodation (doesn't fully cover it, but almost does). The money from savings (working aged 16 onwards and what me and their dad put away for them when they were young - originally intended for house buying once graduated).
Then living expenses i.e. food/books/transport/socialising comes from what they earn in holidays. As I said, this was easy for first and second year as using that money combined with their (small but useful) university bursaries has enabled them to live to a reasonable student standard.
Third year has been really tricky. DS is doing medicine so his holidays were very short by 3rd year, he has managed to get a grant from a charity trust and a scholarship (it took a lot of hard work/pleading/following up but well worth it), he has also moved home to save money. DD is doing a 3 year course and so she did an internship this summer and also went on holiday with friends. The internship, while worth it (she got a job offer :)) was very costly. As BeckAndCall said, it was £100 a week for a travel-card to London plus appropriate clothes.
This year my mother has supported DD by giving £200 a term towards food, she is not coming home as much to save on transport and luckily is in a house where they cook a lot together which is saving on money. It is going to be very tough for her to stay out her overdraft but I really hope we can work things out. If necessary I will do all I can to support her as I don't want her in any more debt than she already is! I am a teacher and so can try to get a tutoring job for the holidays to top-up income.
It is tough, but possible with a lot of planning and looking at finances. Student finance and uni bursaries, IMO often give too much to those who don't need it and too little to those who really do.
DD luckily receives an acceptable amount but others, she has found, really struggle and have to work term time long hours as well as holidays. DC are incredibly respectful and grateful for any support, they have also become amazingly good at managing money and budgeting.
DD was saying the other day it does her head in when some of her wealthy housemates who live off bank of M and D moan about money or make out they are living in great debt, when her other housemate is genuinely struggling and DD herself is quietly making sacrifices and getting on with it the best she can.
Sorry for rambling on!!!