Oil and gas company Gulf Keystone Petroleum has unveiled plans to move to the London Stock Exchange's main market from its secondary AIM listing.Gulf Keystone, which has made five finds in four blocks in the Kurdistan region of Iraq, said it expected its shares to start trading on the main market on March 24th and to be cancelled on AIM at the same time.Gulf Keystone declared its flagship Shaikan discovery as commercial in 2012 and has begun commercial production and crude oil exports from one of two new production facilities there, with the second nearing completion.It expects to produce up to 40,000 barrels per day from Shaikan in the near term.Shares in Gulf Keystone rose 6.75p or 4.45% to 158.5p at 11:14 in London.PW