The Archives and Records Association (ARA) is the lead professional body for archivists, archive conservators and records managers in the United Kingdom and Ireland. It has produced a useful report on Volunteering in Archives (2014). This might be useful for organisation that intend to use volunteers in their archive projects.
The British Records Association (BRA) aims to encourage and assist with the preservation, care, use and publication of historical records. The BRA’s main function is to rescue documents in danger of loss or destruction.
The Charity Archives and Records Management Group (CHARM) is made up of people responsible for or involved with the management and care of the records and archives of charities and voluntary organisations. CHARM membership is open to anyone interested in charity records and the group meets quarterly.
The Collections Trust works principally with museum collections. However they have a range of resources and standards which charities, including those with objects in their possession, might find useful. In particular SPECTRUM 4.0 contains information on 21 collections management standards, all with accompanying guidance.
The Community Archives and Heritage Group (CAHG) is a national group which aims to support and promote community archives in the UK and Ireland. Its website includes some very useful resources including and advice on funding.
Information Records Management Society Here you will find a range of resources designed to support members and the wider information profession
National Records Scotland: Resources and guidance on how to comply with the Public Records Act 2011 https://www.nrscotland.gov.uk/record-keeping/public-records-scotland-act-2011/resources