As the clocks go back and the days get shorter, winter brings cosy evenings, festive celebrations and opportunities to slow down. But for some, the colder months can also bring feelings of loneliness and isolation. With fewer daylight hours, it's natural to notice changes in our energy and mood. According to the NHS, reduced sunlight during winter may affect our body's internal clock and chemicals such as serotonin and melatonin, which play a role in regulating mood and sleep