Chalk Farm Salvation Army Band and children from various schools, assisted by members of the BBC Symphony Chorus perform Hark the Herald Angels Sing .\rbr\rbrNorthop Junior Band part of Blue Peter Christmas Special 2013 playing Hark the Herald Angels Sing.\rbr\rbrBlue Peter - Thursday 17th December 2015 Radzi Chinyanganya likes to tell people about his Christian belief, and this isnt the first time hes mentioned it on .