@ColouringPencils the costs depend a lot on where they are - Sheffield, Newcastle, Cardiff can be managed on a smaller budget than London, Bristol or Manchester. It is possible that things will change by the time your DD gets to year 4 of a course, but basically, at current rates,
Years 1-4 - Loan for fees and around £4.650 maintenance. I think that in MOST places now, they need over £10k pa to live on, so I would say £5-7k top up required, which could be a mixture of a bit of working and parental contribution.
Years 5+ - NHS pays fees, and a bursary which has been £1k for as long as I have been aware of medical student funding. The minimum maintenance loan goes down to around £3k, so they will need an extra £7-9k, just when your DS is also at uni. It is much harder for them to work in Y5+
It may change, there is a campaign running for a liveable bursary.