Warning signs must be properly affixed to each site entrance, to alert site visitors and staff of the dangers and site-specific safety requirements before entering the site. 

If any transformers on the site are either NOT independently fenced off or NOT enclosed within a structure with a lockable entrance (like the images below), then the entire site must be designated a High Voltage site under Electrical Safety, Quality and Continuity Regulations (2002).  This means Danger of Death signage needs to specify High Voltage warnings as well.

A CCTV sign also needs to be displayed informing people that there is a CCTV system in operation and who it is operated by.