 Meanwhile , the police located the embassy caretaker and took him to their forward headquarters to brief the SAS and senior police officers . He informed them that the embassy 's front door was reinforced by a steel security door , and that the windows on the ground floor and first floor were fitted with armoured glass — the result of recommendations made after the SAS had been asked to review security arrangements for the embassy several years earlier . Plans for entering the embassy by battering the front door and ground @-@ floor windows were quickly scrapped and work began on other ideas . 
