What is a Bible Christian?

[Kit]

Just found a rellie, Mark, in the Navy in 1911. The last column of the census is titled:
Additional Particulars for H.M. Ships in Scottish or Colonial Waters.

For the page Mark is on this whole column lists the persons religion. Mark's is Bible Christian but I don't know what it is.

The other religions are: Church of England, Wesleyan and Roman Catholic.