The Government has set a target for the UK to be a net zero carbon society by 2050. This is a massive National challenge, and the Electricity sector will have a major role in helping to deliver this ambition. A lot of the new connecting capacity will be smaller dispersed modules, typically below 50MW. These will include renewable generation, demand (electric vehicle charging, space heating) and grid balancing solutions. The provision of fast, secure network access for these new services is the best way for the Electricity networks to meet this demand. National Grid Electricity Transmission (NGET) has developed a new bay solution which utilises the existing 13kV tertiary winding on its Super-Grid Transformers (SGT) via a step-up transformer to provide a supply connection at 33kV. The paper introduces this new design and the challenges which must be overcome to deliver the application. The focus will be on the protection and control for the new transformer tertiary connection arrangement, highlighting the interfacing challenges with the existing protection and control systems. It also explores the considerations for the longer-term asset management and future applications associated with this type of connection.