Celebrating its Silver Jubilee in 1981, the name was changed more fittingly to The Institute of Spiritualist Mediums and a sub-section, the ISM Home Circle Link, was announced. The Home Circle Link offered registered small bona-fide home circles teaching through literature and correspondence and a quarterly magazine. Registered circles could obtain advice and guidance if required and were guaranteed confidentiality. This continued for almost 16 years, but under the same Spirit guidance by which it came into being, it has now undergone immense change, whereby guidance is available for any development circle - world-wide, in need of prompt assistance.
It should be noted that the ISM does not own property, nor hold regular church services, but has become and insists it remains "a vehicle for the work of Spirit". Members who are working mediums of experience may apply for Registration as an Approved Medium (ISM/RAM) of the Institute which requires a high standard of ability, detailed knowledge of Spiritualism and Mediumship, as well as expertise on the public platform.
During the course of its history, it has become known for the high standard of its teaching and presentation, its forward-looking progressive attitude, all achieved without any paid employees at any time. All the administration is carried out by volunteer committee members, mostly in their own homes. All funds raised are used to defray necessary expenses to fund events for teaching purposes and ISM Tutors give their time freely in service.