An inquiry probing British involvement in Iraq has heard that UK military chiefs began planning for potential involvement in an American-led invasion after a 2002 meeting between former President George W Bush and ex-Prime Minister Tony Blair. Admiral Michael Boyce, the former chief of the defense staff at the time, said Thursday a small group of people were involved in the planning, which began after the former president and prime minister met in Crawford, Texas in April 2002 a year before Parliament authorized involvement.