Their course is 5-6 years long so accumulated debt is higher.
Their long hours and reduced length of Summer holidays (2-4 weeks) makes supporting themselves through extra-curricular employment difficult.
There starting wage when they qualify is actually alot lower than many other graduates (five-six years after starting their degree).
They often have to commute to different hospitals.
Atm they get a bursary to cover tuition fees in the final year only, but for a low income student, the way that this works out with a reduced student loan they end up with £1000 less to spend on food etc in the final year.