Tomorrow the BBC will reveal how a talented 13-year-old girl called Hazel helped the RAF prepare for the Battle of Britain. Hazel helped her dad, Captain Fred Hill, determine how many machine guns RAF fighter aircraft would need to defend the nation. Watch ‘The School Girl Who Helped to Win a War’ on the BBC News channel on Saturday at 8.30pm or Sunday at 4.30pm. #DetectAndDefend | Royal Air Force

Help us record hazel tree flowers this winter! 🌳 🌰 Hazel catkins are the male flowers of the #HazelTree. They’re a fluffy sign of a woodland in mid-winter and the first step towards a hazelnut crop, but did you know they can also help us track the impacts of weather and climate change on #wildlife? 🌡️ The timing of hazel flowering events in the UK is temperature dependent and is influenced by winter temperatures in December to February. 📈 According to the #StateOfUKClimate report, hazel flow