Fears are growing for three British schoolgirls who are believed to be making their way to Syria. <br /><br /> Kadiza Sultana, 16, Shamima Begum, 15, and their unnamed 15-year-old friend left their east-London homes without telling their families.<br /><br /> CCTV footage taken at London’s Gatwick Airport on Tuesday (February 17) shows the trio going through security, before they boarded a flight to Istanbul.<br /><br /> Urgent appeal<br /><br /> UK police have launched an urgent appeal to trace them and are said to be working closely with the Turkish authorities.<br /><br /> A gateway to Syria, Istanbul is one of several areas currently experiencing severe weather conditions, which are affecting travel links. British authorities say this could mean there is a chance the girls are still in the country.<br /><br /> Social media concerns<br /><br /> Richard Walton, Head of the Metropolitan Police’s Counter Terror Command expressed concern for the girls’ safety.<br /><br /> “We don’t know what’s caused this. We don’t know whether it’s contact through social media o
