Pool gates must be locked at all times

During the past 10 days I have been showing various maintenance companies our urbanisation and pools. Each time I have gone to the eastern pool I have found one of the gates unlocked.
I cannot stress how important it is for these gates to be kept locked. The gate in question is one of these facing the road and it would be easy for unsupervised children to open the gate, wander into the pool and fall in, particularly after dark.
I am sure that no-one wants the death of a child on their conscience so please will everyone ensure that these gates are locked at all times.