LONDON, March 2 (Reuters) - Britain's Royal Navy said on Thursday it had seized Iranian weapons, including anti-tank guided missiles, last month from a smugglers vessel in international waters in the Gulf of Oman. When hailed by the Royal Navy, the vessel initially attempted to navigate to Iranian territorial waters but was stopped by a team of Royal Marines, who then boarded the small boat and recovered the suspicious packages, Britain's Ministry of Defence said. See here for a complete list of exchanges and delays