LONDON, April 7 (Reuters) - Protesters against climate change broke windows at the London headquarters of Barclays in the Canary Wharf business district on Wednesday. The activists from the Extinction Rebellion group carried placards with slogans such as “Better Broken Windows than Broken Promises” and pasted the message “In Case of Climate Emergency Break Glass” on the front of the bank’s building. (Reporting by Guy Faulconbridge, writing by Estelle Shirbon; Editing by Kate Holton)