Hi Chris.
Had a look around The Times as regards Christopher.
The Times, Saturday March 12th, 1904.
Official Appointments and Notices, London Gazette, Friday 11th March, 1904.
Royal Marine Artillery.
The undermentioned Sec. Lieutenants to be Lieutenants:- S. Cruddas, dated Jan., 1902 with seniority next below Lieut. R.W. Hutton; S.C. Wace, G. Rutledge, C.M. Durrant.
The Times, Thursday December 15th, 1910.
Naval Appointments.
Royal Marines.
Lieut. C.M. Durrant R.M.A., to the Neptune, on commissioning, to date Jan. 11th.
http://en.wikipedia.org/wiki/HMS_Neptune_%281909%29The Times, Thursday Feb. 29th, 1912.
Naval Appointments.
Lieuts. R.M.A.- C.M. Durrant, to the Vanguard, and F.C. Willes to the Commonwealth, on recommissioning, to date March 28th.
http://en.wikipedia.org/wiki/HMS_Vanguard_%281909%29The next entry i think i have already sent you Chris, having been promoted to Captain and then placed on the Retired List, London Gazette, May 14th, 1915.
After that, the trail sees to go a bit 'cold'.
Hope the information is of some use.
Kindest regards, Chris.