Yavuz Sultan Selim, ex SMS Goeben
Struck mines at 0610 and 0948, ran aground at 1148 off Nagara in the Dardanelles, attacked unsuccessfully by RFC and RNAS a/c from HMS Ark Royal and Empress, freed 26th January 1918, arrived Sevastapol 26th May 1918 to dock for first time since 1913

Medillii, ex SMS Breaslau*
Mined 0831, and 4 more times between 0900 and 0905, sank
4 Turkish destoyers

British Forces

Aegean Squadron
    Rear Admiral Hayes-Sadler

HMS Lord Nelson,  HMS Agamemnon
    Both supposed to be on 1 hours notice at Mudros
4 to 6 destroyers on patrol at Imbros

On 16th January 1918, Hayes-Sadler took HMS Nelson to Salonika, instead of using a yacht, HMS Triad, maintained at Salonika for that purpose.

Mudros
HMS Agamemnon (unsupported)
3 light cruisers
1 sloop (under repair)
1 monitor (under repair)
4 destroyers (2 ready for sea)
HMS E-12 (under repair with a fractured shaft; her Captain, T. Williams-Freeman, wanted to have a go at Goeben on 1 shaft as soon as it was known that Goeben was aground, but was over-ruled by Hayes-Sadler)

On the 21st January, joined by
HMS E-2, Lt. P.H. Bonham-Carter (“Bonham the Good”, cousin to Stewart “Bonham the Bad” Bonham-Carter, see Zeebrugge and PQ18)
HMS E-14*, Lt. Commander G.S. White, sunk by Turkish batteries off Kum Kale, 28th January 1918

Kusu Bay, Imbros:
HMS Raglan*
HMS M28*
HMS Tigress
HMS Lizard

* Sunk

Sources:
Breyer, S., (1973), Battleships & Battle-cruisers 1905-1970
Marder, A., (1970), From Dreadnought to Scapa Flow, Volume 5