"As Christians we express a commitment to peace which is universal. We pray for peace and a conversion of the men and women of violence who commit such acts."
In their submission Cardinal Nichols and Archbishop Welby argued that Government should promote freedom of religion and belief as a fundamental human right.
The Bishops said the document arising from the Youth Synod is "a great invitation from Pope Francis asking all of us to reflect on so many aspects of our world today, a world in which hunger, homelessness, violence, cruelty and exploitation touch and diminish the lives of so many young people".