There are no prescribed hours of attendance for office managers . The main office hours comprise a 371/2 hour week worked from 8 . 30 am to 5 . 00 pm on Monday to Friday , with one hour for lunch . All sections work a flexitime scheme of attendance which features " core hours from 9.30 am to 4.00 pm with a lunch break of between 30 minutes and two hours ' duration , with the opportunity to work from 7.30 am to 6.00 pm. daily , at which time the premises are locked . Office managers do not qualify for overtime rates for any additional hours worked , but time off may be taken for any hours required to be worked at weekends . In one calendar year, a total of 5 weeks ' holiday may be taken . Staff are reminded that they may not take more than two consecutive weeks of holiday .