Mr Angell added: "An ICV can help someone who is in dire need and assure that person that no harm will come to them."
ICVs receive regular training in-house, as well as from the Independent Custody Visitors Association.
The Independent Custody Visitors Association (ICVA) was set up in 1993 to promote and support the effective provision of custody visiting nationally. It has since been independently advocating on custody conditions, with ICVs operating throughout the UK for 16 years. The company is funded by the Home Office.
To apply for a role as an Independent Custody Visitor, a form can be downloaded from http://www.gwent.pcc.police.uk/engagement/getting-involved/custody-visiting. Or, you can contact the office of the Police and Crime Commissioner on 01633 642200. All applications, whether sent via post or email, must be received no later than 4pm on Friday 31 July 2015.