Mumsneedwine. You say this, however the final years when medical students are on placement can be very cheap indeed. (Again perhaps something to look for when applying.) No accommodation costs if they are living in placement accommodation, no fees, a lot of cooking together and less going out as they are studying for finals on top of spending all day in hospital. We let our DD have the summer off, but many of her friends worked as HCAs and will be able to balance their books.
One additional saving is that she is paying nothing for her elective. Your DD will know some who are paying £££ to spend two months abroad.
Graduate medicine students manage their whole five years, and according to DD, despite them often having to balance work and study tend to do better.
I also don't know whether University bursaries continue. I do know that Bristol prioritises the less well off for "out-placements" precisely to help with costs.
Yes it is an extra year, but there is always something. Lots of charities around like City Guilds will grant money for young people who need funding to achieve ambitions.
The message that you can't do something because "you are poor" is a sad one. Yes money helps, but overcoming adversity is also a useful skill to gain. Plenty of less well off students do seem to find a way to find the money. My message, and I predicted the blowback, was that ambitious students who have a clear interest in a specialisation, might like to look at intercalation opportunities when deciding where to apply.