Previously, heavy concrete trench covers had been fitted over below ground utilities and equipment. Due to their weight, the covers were extremely difficult to remove and replace safely, causing manual handling risks for operators. The equipment beneath the trench covers also posed a hazard to the public as the covers did not have a secure locking system. Inadequate security in the form of wooden fencing surrounding the perimeter further highlighted the need for modernization. modernisation.

In addition, the concrete covers had begun to break apart, potentially leading to a substantial risk to the underground valve and piping system. The obtrusive framework (pictured below) led to further difficulties and health and safety risks for engineers accessing equipment in the trench.