My company currently employs me on a rotating shift pattern; days, nights and afternoons. On the day and afternoon shift there is always a team leader or supervisor present with keys to the padlocked gates in the carpark.
Our manager has recently ordered senior staff to keep the gates locked outside of office hours due to security risks etc which is understandable. However, when I am working a week of nights, we (me and the 2 other employees on site) do not have access to leave the site after midnight when the gates are locked.
Essentially, there are three of us locked inside the premises with no access to get out of the gates if anything happened (fire, accident) and thus no access for emergency services to gain access either. The other two shifts have a chargehand as part of their team with a set of keys each. My shift does not for some reason.
The building itself is not locked, we can go outside but we cannot leave site for whatever reason, whether it be to go for break elsewhere or to escape the premises in an emergency.
We have expressed our concerns on this matter to our employer, but they insist its within reason to do this, even our health and safety manager confirms it's ok; we are not convinced however.
How can I best go about resolving this situation? Does it make sense to look for legislation about this problem?