The UK is showing signs of increased international engagement and leadership in the post-Brexit era. Prime Minister Keir Starmer's politically stable government is using the International Energy Agency (IEA) summit to advance its vision of becoming a 'clean energy superpower.' The UK has confirmed funding for Carbon Capture, Utilisation and Storage sites and has overturned a ban on onshore wind power construction. The government is also focusing on closer alignment with the EU on electricity trading and carbon emissions trading schemes. However, the US, represented by Acting Assistant Secretary of Energy Tommy Joyce, opposes global climate diplomacy and may pose a challenge to the UK's energy security vision.