Whilst volunteering at the Old Bailey for the Witness Service, Lady Copisarow supported an unrepresented litigant through contested divorce proceedings at the Royal Courts.

These experiences drove Lady Copisarow, Michael Naish and Mark Sheldon CBE to establish the PSU to meet the human, non-legal, needs of people attending court alone and without legal representation.

Following changes to legal aid in 2012, the PSU had a rise in demand for its services and now operates from 23 courts in 17 different cities across England and Wales.

In October 2019 the PSU was rebranded as Support Through Court to convey more effectively the services offered to litigants in persons.

In February 2020 Support Through Court launched its national helpline to offer individuals who cannot commute to an office an alternative method of accessing its services.