Over 15 fire engines drove to the scene at lunchtime and the cause of the fire is not yet known.
“Emergency services have received over 20 calls to the fire, with the first coming in at 11.59am. Crews from Soho, Dowgate, Islington and surrounding fire stations are at the scene,” said a spokesperson for London Fire Brigade, LFB.
Warns of interference
The incident is causing traffic jams in an already busy busy area, and LFB is warning people of disruption.
Somerset House is a large Renaissance complex where several events are held throughout the year, including the famous ice rink in winter.
The cause of the fire is not yet known.
The text is updated.