As a child in Leicestershire in the 1940s, Biddy Baxter was a devoted reader of the work of Enid Blyton. She sent the creator of Noddy and The Famous Five a fan letter and was so delighted to receive an answer that she replied with follow-up questions. To her dismay, the response was identical to the first.
This sense of being let down by an adulated adult proved formative. When Baxter, who has died aged 92, was in charge of Blue Peter, the long-running children’s show that she essentially created, she introduced an alphabetical card index – that most efficient pre-digital database – to ensure that viewers received personalised replies.