More than 100 firefighters were called on to tackle a blaze which broke out at London’s Somerset House on Saturday. A pillar of smoke could be seen billowing from the large neoclassical building used as an arts centre as flames blazed from the roof. 15 fire engines were deployed to extinguish the fire, according to the London Fire Brigade. The cause is not yet known, but the Fire Brigade reportedly received the first call about the fire at 11:59 am local time on Saturday. A spokesperson said: “Crews are tackling flames located in part of the buildings roof. Two of the Brigade’s 32m ladders hav…