Labour leader Keir Starmer has highlighted the value that Christian political activists bring to society.
"The Christian community has always been at the forefront of social activism, seeking justice and speaking truth to power," he said.
"I've seen Christians active in their local food banks, homeless shelters, and many other projects."
The Labour Party leader was giving a speech congratulating campaign group Christians on the Left on its 60 year anniversary.
The group, which was formerly named the Christian Socialist Movement, is committed to social justice, protecting the environment and to fostering peace and reconciliation.
Sir Keir said the group has been a valuable part of the Labour Party movement.
"As part of our movement, Christians on the Left continue to be a campaigning force in their local communities, and nationally, on issues such as tax evasion, and food poverty," he added.
"Within our party, you've set a great example of the culture we need if we're to unite our membership and form the next Labour government.
"It is this commitment to local activism, national campaigning and our party culture that's made such a valuable contribution to our society and to the Labour Party. I would like to thank all members of the Christian Socialist Movement and Christians on the Left for your dedication over the past 60 years."
Christians on the Left had an online service of Thanksgiving on Thursday evening hosted by Shadow Faith Minister Janet Daby.