The 2008 season saw Dasaolu rise up the national rankings and introduced to the UK Athletics warm weather training camp. Under the tutelage of coach Michael Khmel at Loughborough University and training with 2006 World Junior Champion Harry Aikines-Aryeetey and former European Junior Champion Leon Baptiste, Dasaolu won the 2008 England under-23 championships and reached the semi-finals at the British Olympic Trials.