From the late 19th century and into the 20th century, the church's main offering revolved around two Sunday services. Sailors would have a service at 9am, whilst another would follow immediately after at 10:30am for the military and civilians. Right from the opening of the church, it proved a valuable establishment for the community as well as to the various Regiments in Garrison and the Royal Navy. It was supported and used by the community right up until the end of the 20th century, including Portland's three prisons - HM Prison The Verne, HM Prison Weare, and the Young Offender's Institution.