Next, lightly flour the work surface, make sure you have lightly oiled the tin with sunflower oil (not olive or vegetable as they vaporize) and you have a rolling pin. Punch both dough's down removing the air, join both together and knead for 30-60 seconds. Then fold the edges of the dough into the centre, moving the dough round as you do, you should end up with a tight ball; this creates tension on the surface of the loaf and helps give the loaf structure. Place the ball on the work surface and using both hands slightly underneath, continue until all the dough is rolled up and sealed. Using a rolling pin, roll the dough out to a large rectangle, the width should be no wider than the tin. When you have done this, start with one end and fold over the dough about a good inch or two from the bottom, using the heel of your hand press firmly on the seal, roll the roll of dough forward and seal again, remember to press firmly as you do. Keep going until all the dough has been rolled and sealed, put the dough into the tin with the seal at the bottom and gently flatten the dough roll in the tin. This video will help: https://www.youtube.com/watch?v=wx5I5O_RoeI