Emily Wilding Davison

In 1991 Tony Benn secretely put a plaque dedicated to Emily Wilding Davison, and draped in suffragette colours, inside the cupboard that she hid in.

More details here

IN LOVING MEMORY OF EMILY WILDING DAVISON

IN THIS BROOM CUPBOARD EMILY WILDING DAVISON HID HERSELF ILLEGALLY, DURING THE NIGHT OF THE 1911 CENSUS. SHE WAS A BRAVE SUFFRAGETTE CAMPAIGNING FOR VOTES FOR WOMEN AT A TIME WHEN PARLIAMENT DENIED THEM THAT RIGHT. IN THIS WAY SHE WAS ABLE TO RECORD HER ADDRESS, ON THE NIGHT OF THAT CENSUS, AS BEING THE HOUSE OF COMMONS. THUS MAKING HER CLAIM TO THE SAME POLITICAL RIGHTS AS MEN. EMILY WILDING DAVISON DIED IN JUNE 1913 FROM INJURIES SUSTAINED WHEN SHE THREW HERSELF UNDER THE KING'S HORSE AT THE DERBY TO DRAW PUBLIC ATTENTION TO THE INJUSTICE SUFFERED BY WOMEN BY SUCH MEANS WAS DEMOCRACY WON FOR THE PEOPLE OF BRITAIN.

Notice placed here by Tony Benn MP

"I must tell you Mr. Speaker, than I am going to put up a 
plaque in the House. I shall have it made myself and 
screwed on the door of the broom cupboard in the Crypt."  

Submitted by @Lyra_42 via @Ritterton