Assure the interviewer that you understand safety construction standards and regulation. You also want to display to the interviewer that you put safety first.
"I admire the fact that EMCOR (UK) Limited puts the safety of their employees first. I am very immersed in the current safety standards for the engineering and construction industry. I do have a recent certification in Occupational Safety and Health Administration (OSHA) and am committed to applying that knowledge to a position with EMCOR (UK) Limited. If there are additional pieces of training and certifications that you would like to see, I am happy to comply."
"I believe that safety on site is incredibly important and, for that reason, I am eager to take any safety courses that you recommend. At this point, I have taken coursework in fatigue management, reporting, safe lifting, alcohol and drug awareness, and PPE guidelines."