Demonstrations against the closure of A&E departments in at West London are due to take place this lunchtime.
The protest is the culmination of a week of action against the plan to close the accident and emergency departments at Hammersmith, Charing Cross, Ealing and Central Middlesex hospitals.
There'll be a rally in Lyric Square in Hammersmith, while in Kingston protestors will march from Kingston Hospital to the Kingston Guildhall.
Both events start at midday.
More top news
Sir Bernard Hogan-Howe's decision to retire comes after growing speculation about his future and his relationship with mayor Sadiq Khan.
Sir Bernard Hogan-Howe is to retire after five years as the Commissioner of the Metropolitan Police, according to Scotland Yard.
The curtain will come down on the show for the final time at the Piccadilly Theatre in March next year, before embarking on a UK tour.