Complex sentence: Although the King of Arms has full discretion over the composition of the arms, he will take into full account the wishes of the applicant; these will include allusions and references to the applicant's life and achievements.
Split into simpler sentences: Although the King of Arms has full discretion over the composition of the arms, he will take into full account the wishes of the applicant. These will include allusions and references to the applicant's life and achievements.