Diligence (Tomahawk) 5 July 1918 to 13 Mar 1919
Although I've managed to decipher this, I have been stumped by HMS Tomahawk. I believe that HMS Tomahawk was a Yarrow S class destroyer of 12th Destroyer Flotilla Grand Fleet (the Depot Ship for which was HMS Diligence).
My grandfather, Norman Haslehurst, joined HMS Tomahawk as telegraphist, on the same day as yours (It seems to have been newly built). He was also at Vernon for some of the same period. As the ship's complement was 90, and they were on board for 5 months at the same time, I imagine they might have known each other.
His record was as follows;
Ganges 12/02/15 Boy II
Impregnable 10/04/15 Boy II, Boy I, Boy Tel
Vernon 09/07/15 Boy Tel, Ord Tel
Victory I ?? /??/17
Diligence (Tomahawk) 05/07/18
Diligence (Tryphon) 01/01/19
Shore Demob 18/02/19