EFFORTS are to be made to improve working conditions of Legislative Council security staff. Following an appeal from employees, the assistant clerk to Legco, Wong Wai-man, pledged to look at ways of improving building ventilation outside office hours when the central air-conditioning system is turned off. One of the options is installing electric fans. Mr Wong admitted the work room was ''a little bit congested'' for the 20 assistants responsible for security at the Legco building. The number had increased from 12 to 20 since 1992, but there was little space to expand the office, he said. Mr Wong rejected officers' demand for a common area, saying they had work scheduled for every hour on duty and there was no time for them to make use of a common room to rest. The security staff complained in a letter to the South China Morning Post that in contrast to the spacious dining hall and common room shared by Legco members, they shared a 180-square-foot room, where there were 19 lockers and a desk for the team leader. The assistants, including three women, had no other place to change their clothes, the letter said. It described working conditions during long holidays when most of the staff at the building do not work as suffocating. Legislative Councillor James To Kun-sun said security assistants could change uniforms in the toilet. ''I think they've got some common areas. There are a few chairs at the corner of the corridor where they can sit and rest,'' he said.