P204 CEEFAX 204 Mon 13 Oct 21:17/45     ]  President Reagan is to speak later tonight on television about the collapse of the Iceland talks. His address is being seen in +ashington as one of the most important speeches of hes career. His critics claim that bz refusing to delay the development of the "Star Wars" defence system, hj threw away the best chance ever of achieving an arms control agreement. Mr Reagan has telephoned Mrs Thatcher to give her his personal account of the talks. The two said they hoped to continue the discussion shortly.