Buses in the UK are at the forefront of transport decarbonisation due to their suitability for transitioning to zero-emission vehicles. The country's bus operators, including in London and beyond, are making significant strides in electrifying their bus fleets. Challenges such as grid capacity for charging are being tackled with innovative solutions like battery energy storage systems. The UK government is providing substantial funding support through programs like ZEBRA to accelerate the transition to electric buses, with a focus on both urban and rural areas. Additionally, hydrogen buses are gaining attention in regions requiring longer ranges and quick refueling. While most efforts have been on battery electric vehicles, hydrogen buses are proving useful in certain areas. However, challenges such as infrastructure investment are highlighted by instances like Aberdeen's hydrogen bus fleet being off the road due to insufficient infrastructure.