Britain has been preparing to extradite Arab insurgents to their native countries. Officials said the Home Office was preparing to launch talks with several Arab countries for the deportation of suspected insurgents who entered Britain as political refugees. They said many of the Arab immigrants have used Britain as a launching pad for attacks in the Middle East as well as for financing Al Qaida and related groups. "I think we should be prosecuting much more energetically our ability to deport the individuals concerned to the countries from which they come," Home Secretary Charles Clarke said.Officials said the government would seek guarantees from Arab countries that they would not torture or execute any insurgent deported from Britain. They said all of the suspects would undergo trial in their native countries in proceedings open to British and other monitors.