David Cameron has given a ringing endorsement to Mitzvah Day, hailing it as "a powerful movement for change, harnessing the enthusiasm of thousands of people who want to give their time to make a difference in their communities.

"It is remarkable that, this year, over 37,000 volunteers will support hundreds of causes, from transforming local community spaces to supporting elderly and vulnerable people. Everyone taking part should be incredibly proud of what they will achieve."

In Scotland, First Minister Nicola Sturgeon praised Mitzvah Day as "an excellent example of how people from all walks of life come together and show how easy it is to put Jewish values into action for the benefit of all communities.

"In the past few months, we have witnessed Scotland's faith and belief communities working together as one voice to show their support for Scotland's response on the refugee crisis. Commitment to work together on common concerns really shows the vital role Scotland's faith and belief communities play in civil society."

More than 150 UK charities will benefit from activities during Sunday's day of good deeds. Advance activities have been taking place at schools and businesses.

Liberal Judaism also got in early, with volunteers helping a church near its central London HQ to prepare lunch for 70 homeless people. Then LJY-Netzer youth movement workers cleaned up the herb garden and cleared bags of leaves. It is hoped that Liberal Judaism staff will now help out at the church on a more regular basis.

Labour MPs Sadiq Khan, Keir Starmer, Tulip Siddiq and Luciana Berger, Conservative peer Baroness Williams of Trafford and Liberal Democrat Lord Verjee are among politicians due to take part in Mitzvah Day events.