Two Catholic masses were held on April 14th. Fr. Thomas Byles conducted the serive in second class while Asst. Purser Reginald Barker's took charge of the non-Catholics. No doubt Jospeh Peruschitz and Juozas Montvila aided Byles and provivded translations for the non-English speakers. The three would then have conducted a similar service for 3rd class.
Later in the evening, Revd. Ernest Carter held an "evensong" for anyone wishing to attend (about 100 did so, eventually). He was an anglican priest from Whitechapel, London.
Kirkland, Bateman, Lahtinen, and Harper took no active role in religious activity on board Titanic so far as we know. Bateman and Harper were both baptist ministers. Kirkland, although often referred to as a presbyterian, was in fact a free churchman.
Hope this helps,