On January 1, 2015, the hacker group “Arab Security Team” successfully hacked and defaced multiple websites in the UK. The websites included the Bristol Bus and Train Timetable website as well as multiple British retailer sites. Defaced pages featured the above image. The group’s Facebook page (since deleted) claimed members of the group hailed from Tunisia and the Ivory Coast.
Source: News.softpedia.com, January 3, 2015; Infosecurity-magazine.com, January 5, 2015.