Jamieson 's day started slower than his co-leader .
Jamieson ensured parity with Bjork thanks to birdies at 12 , 13 and 18 - the latter coming after a beautifully judged approach .
Jamieson 's day started slower than his co-leader but he ensured parity with Bjork thanks to birdies at 12 , 13 and 18 - the latter coming after a beautifully judged approach .