The NUS has warned that the UK could be heading for an "epidemic of university dropouts", with a study showing that more than two in five had seriously considered leaving their course.
Of these, almost half of undergraduates said money worries were a key factor in considering whether to drop out.
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The city has endured weeks of disruption as police investigated the poisoning of Sergei and Yulia Skripal.
Dr James Goodman underwent the procedure on his tongue at the Royal Marsden NHS Hospital.
The boat is carrying 224 migrants the Italian coastguard had assigned to Libyan authorities to rescue.