Cause of grey hair may be ‘stuck’ cells, say scientists As people age, pigment-making cells lose their ability to mature and maintain hair colour, research suggests. Source
More ambulance workers to strike after early May bank holiday Unite union announces industrial action across the south of England and West Midlands. Source
Junior doctor strike led to 196,000 cancellations The walkout was most disruptive NHS strike yet - with bosses warning future action will risk care. Source