Tonight is the yearly Children in Need appeal here in the UK. BBC One is taken over by a telethon for about seven hours. The idea is to raise money to help disadvantaged children. So you see video clips of children from other countries walking miles for water, young carers helping their mum or dad and disabled children doing things too. And it’s a given that those children will either look sad or have their story told using emotive language such as “suffers from…” Or “whilst other children are playing little Johnny must…” Interspersed with those clips are famous people doing silly stuff, frequent updates on how much has been…