The British public had strong anti-slavery beliefs and would not have tolerated joining the side of a fight where slavery was now a prominent issue.

• 此宣言在美国的历史与种族关系上影响深远，当下则有效的阻止大英帝国承认美利坚联盟国攻府。英方当时的舆情为强烈反对蓄奴，不能容许国家加入奴隶制度争议明显一方参战。