Membership of the Scouts has risen during the past seven years from 444,936 in 2005 to 525,364 this year, figures released by the association show.
Since 2002, the number of girls taking part has increased by 69% while more than 50 scout groups catering for young people drawn mainly from Muslim, Hindu and Sikh communities have opened in the last ten years.
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A US Twitter study has found that there are almost 50,000 active pro-Islamic State accounts, but say the number could be as high as 90,000.
In its first test, the 30-kilowatt military laser burned through a truck's engine in a matter of seconds.
Islamic State militants have begun to raze ancient ruins at the site of the Assyrian city of Nimrud.