Why did Georges Danton flee to London after the Champ de Mars massacre in 1791?

Following the Champ de Mars massacre on July 17, 1791, Georges Danton took refuge in London to escape the political repression that followed the event.1

The massacre occurred when the national guard, under the command of the marquis de Lafayette, fired upon a crowd of demonstrators who had gathered to sign a petition demanding the abdication of Louis XVI following his failed attempt to flee the country. Although Danton was a prominent figure in the Cordeliers Club and had been active in the movement, his signature did not appear on the petition itself. He later returned to Paris to participate in the elections for the Legislative Assembly.12