Two chocolate sandwich bicuits akin to a Penguin but with a coconut flavour. 'Hard like dad, but like mum at heart', described the 'Werther's' type grandad to his grandson as he snapped one in half to share. T Bars came in a yellow wrapper. They were lovely! My go to tuck shop favourite when I was around 12 to 14. Don't remember any adverts for them or when they disappeared but I loved them. Never found anyone remotely my age who remembers them.