A father and son and two sisters from Bishop’s Stortford & Epping Taekwon-do were successful at a black belt grading. Martin Yung tested for second degree black belt while his son Eason Yung tested for first dan alongside siblings Hazel and Alice Roffey in Daventry. And Eason became the youngest of the club’s 26 black belts at the age of 11. They were put through their paces in front of the full Tae Kwon-Do Association Of Great Britain committee of grand masters on all aspects of the martial art, including floor work, set sparring, competition-style free sparring and patterns as well as Korean…