Crews have been dealing with the challenging terrain and difficult visibility conditions. A spokesperson for Hampshire Fire and Rescue said: "Crews worked tirelessly throughout the afternoon and into the evening to tackle the fire. "The fire covers an area of approximately 30 metres by 80 metres and is deep-seated within the undergrowth, making firefighting operations particularly challenging." The spokesperson added: "Due to the difficult terrain and reduced visibility overnight, firefighting operations have now been scaled back. A spokesperson for Hampshire and Isle of Wight Fire and Rescue Service said: "Despite the difficult terrain, crews have made good progress this morning.