Believe it or not, today is the 46th anniversary of that chilly day in 1978 when the likes of Tucker, Trisha, Alan, and Benny first arrived at their new secondary school, Grange Hill. Tucker flicked an elastic band at Trisha in assembly, starting a rivalry that was to endure throughout their time there. Football-mad Benny was wearing jeans and trainers because his single mum couldn’t afford the uniform. Nostalgic photos on the BBC’s social media today betray its nervousness then, when it commissioned just nine episodes of Grange Hill from a 28-year-old unknown Liverpudlian writer called Phil R…