Prime Minister Narendra Modi arrived here on Thursday for a three-day visit.
During Modi's visit, India and Britain will sign a number of pacts on mutual investments and defence cooperation.
Modi's visit to Britain is the first bilateral visit by an Indian prime minister in nine years after Manmohan Singh's visit in 2006. Singh visited Britain in 2009 to attend the G-20 summit.
On November 14, Modi will leave for Turkey to attend the annual G-20 summit.
