In the midst of global energy sector turbulence, governments worldwide are increasingly seeking solutions to secure the energy supply and achieve decarbonisation targets. The deployment of renewable energy sources, including hydrogen and sustainable biomass, is essential for a successful energy transition. Despite decreasing costs of renewable technologies, additional measures are required to accelerate the transition. Power system models use various methods to integrate renewable energy, focusing on flexibility solutions like storage, interconnections, and curtailment. Studies conducted in Great Britain highlight the need for large-scale storage, imports, and dispatchable renewables to support high levels of renewable energy generation. Furthermore, the potential of power to gas technology for producing hydrogen from surplus renewable energy has been identified as a promising strategy for effectively and economically addressing energy challenges in the region. The National Grid Electricity System Operator in Great Britain has developed scenarios for different levels of societal change and decarbonisation speeds, with a strong focus on achieving net-zero emissions. Challenges such as inertia reduction affecting frequency stability are being addressed in the power system, particularly regarding the impact of renewable energy sources replacing traditional fossil fuel-based generation. Overall, the emphasis is on pursuing innovative solutions and collaborative efforts to navigate the energy transition effectively and ensure a sustainable energy future.