[1] The organisation relies on volunteer medical professionals to provide healthcare assistance in support of the emergency services.

[7]: 45  [8] In 1991, the organisation increased their involvement in educational aspects, making available residential courses covering pre-hospital care and resuscitation.

[12] BASICS members are used to provide extra skills at the scene of major incidents, or for particularly difficult patients.

These supplementary skills include different methods of providing analgesia and, if necessary, surgical procedures which might be needed to extricate the patient.

[32][33] Gareth Davies (doctor) was the Medical Incident Officer for the Aldgate site, with David Wise fulfilling this role at Paddington, Tim Harris and Julian Redhead at Tavistock Square.