The Royal London Hospital is trialling a new way of caring for homeless patients, looking at their social and psychological needs as well as their medical ones.
The London Pathway approach will see all the patients' needs identified in the hospital before discharge, so that help can be arranged in time for their departure.
A nurse will act as the liaison between the hospital and outside organisations - such as a local housing authority or a patient's hostel manager - in the hope that this will reduce the chance of patients being re-admitted with the same health problems.
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The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.
Police have arrested a man wanted in connection with a burglary at the home of pensioner Richard Osborn-Brooks.
The rally comes after it emerged that the Home Office destroyed thousands of landing cards documenting the arrival of windrush-era migrants