Great Portland Estates plc (GPE) is a British property investment and development company operating as a Real Estate Investment Trust (REIT). The company's business model centers on unlocking the potential of central London commercial real estate through active portfolio management, repositioning, and development. GPE's portfolio predominantly consists of high-quality office spaces, which are offered in "Ready to Fit" and "Fully Managed" formats to cater to evolving tenant demands, particularly for flexible and premium workspaces. While offices form the core of its operations and generate the vast majority of its rental income, the company also manages mixed-use assets that include retail and residential components. Geographically, GPE's footprint is highly concentrated in central London, with key properties located in areas such as the West End, City, and Southwark. The company generates revenue primarily through rental income from its investment properties, alongside development surpluses and asset disposals. GPE's competitive position is underpinned by its deep expertise in the London market, a strong focus on sustainability and design-led projects, and a flexible approach to leasing that has resulted in high customer retention rates and premium rental values.