The GMB union says it expects between five and ten thousand people to join a march through west London today in protest against the closure of emergency departments at several hospitals.
Plans have been outlined for the closure of facilities at Charing Cross and Hammersmith & Fulham Hospitals, and Ealing and Central Middlesex Hospitals.
The Union says the closures would lead to longer waiting times at other hospitals.
A spokesperson for NHS North west London said the plan was currently being consulted upon, and they would like to hear people's views.
The march will start in Shepherd's Bush at midday.
More top news
The robbers casually approached their victim on a busy high street before before spraying a noxious substance in his face.
Tencho Hristov ignored warnings and got trapped between barriers at Roydon in Essex.
The 6km bike track will include 130m of the South Circular near Kew Bridge.