Hackney MP Diane Abbott has been appointed shadow health secretary after Heidi Alexander quit her post amid the political fallout from the EU referendum vote.
Ms Abbott, the MP for Hackney North and Stoke Newington and a longtime ally of Labour Party leader Jeremy Corbyn, has been a shadow junior health minister, and is currently serving as shadow secretary for international development.
Posting a picture of her resignation letter on Twitter yesterday, Ms Alexander said: 'It is with a heavy heart that I have this morning resigned from the Shadow Cabinet.'
In the letter to Mr Corbyn, she expressed that she believes the Labour Party needs new leadership.
She said: 'As much as I respect you as a man of principle, I do not believe you have the capacity to shape the answers our country is demanding and I believe that if we are to form the next Government, a change of leadership is essential.
The BMA's Junior Doctors Committee chair Dr Johann Malawana reacted to the announcement, posting on Twitter: 'Am so sad to read this. [Heidi Alexander] has been such an incredible advocate for the NHS & its staff. Sad day.'