 STETS developed from an earlier non-residential ministerial training scheme called Southern Dioceses Ministerial Training Scheme (SDMTS), founded in 1974 by a group chaired by the Salisbury and Wells Theological College Principal, Reginald Askew.The scheme was based at the college but complementary to it, offering training for self-supporting ordained ministry.SDMTS carried forward the ministerial educational work of Salisbury and Wells Theological College after it closed in 1994 and its premises were transferred to Sarum College, which became an independent ecumenical institution for further education.