Blue Peter

Boy band Union J (2014x4815)

: 07, 2014

The presenters are joined in the garden by boy band Union J, who will answer viewers' questions and perform their new single Tonight (We Live Forever), and Brit Award-winning artist Ed Sheeran shares his tips on songwriting. Plus, Barney Harwood takes a behind-the-scenes look at the new CBBC drama Harriet's Army.