Baby Nellie Newbury is just a few months old but she has already proved to be the perfect teacher for pupils at a Cardiff primary school. Nellie and her mum Shelley are visiting Peter Lea Primary School every three weeks with the children’s charity Barnardo’s Cymru as part of a programme called Roots of Empathy. The programme aims to encourage pupils to have greater understanding of others, treat each other with kindness and eventually grow up to be good parents…