Perhaps. There are files at the National Archives at Kew regarding sunk British vessels during WWI. The following record is at the Archives:
Reference: ADM 137/4031
Description: Enemy submarines: particulars of attacks on merchant vessels in Mediterranean
Date: 1917 Apr.
Held by:The National Archives, Kew
Legal status: Public Record
I have no idea whether a passenger list would be in the file. As near as I can tell, the vessel was a general cargo ship and carried only 13 passengers.
You might also want to try old newspaper accounts from the UK.