During his two-day stay, Hu Jintao's talks with British Prime Minister Tony Blair are expected to touch on a range of issues, including economic relations and global warming.
Mr. Hu also is expected to discuss Beijing's push for an end to a 16-year European Union arms embargo against China. The ban was imposed after China's brutal crackdown on the 1989 Tiananmen Square pro-democracy protests.
The Chinese president also will attend a banquet with Queen Elizabeth II.
Following his visit to Britain, Mr. Hu is to travel to Germany and Spain before heading to South Korea for the Asia-Pacific Economic Cooperation forum that begins November 18.
Some information for this report provided by AFP, AP and Reuters.