Overview: It's time for the semi-final and things hot up in the Bake Off tent as the remaining five bakers try to blow the baking socks off judges Nadiya Hussain and Allegra McEvedy. First, the semi-finalists face a gruelling technical knowledge test - including creating a perfectly plaited loaf, with a blindfolded taste challenge. Then they must conquer enriched dough, to produce 12 show-stopping regional buns worthy of a place in the Junior Bake Off final. Sam and Mark oversee proceedings and try to keep everyone semi-calm!