Hello Darius
I haven't found any corresponding claim for a sinking as yet for the date in question, and for the vicinity of Cape Alupo, if that is the correct area.
ADM 199/268 in the National Archives contains monthly summaries for Mediterranean patrols, together with claims for vessels sunk, but whereas there are summaries for Western Italy and the Adriatic for the month of September 1944, there isn't one for the Aegean. The following extract which forms part of MO 013406/44 within the aforementioned ADM 199/268 throws some light on the possible reason why.
Report of Proceedings of Coastal Forces in the Mediterranean during September – October 1944
AEGEAN.
16. In the middle of September operations were undertaken in a new area — the south-western part of the Aegean. The 60th M.G.B. Flotilla and 29th M.L. Flotilla sailed from Brindisi for Kithera, escorting their own supplies of petrol, stores and water, loaded in an L.C.T. and an L.C.I. The 28th M.L. (M/S) Flotilla sailed from Malta with the 5th M/S Flotilla and swept the approaches to Kithcra, which was then occupied by British forces. An advanced operating base was set up there on 16th September, which at the end of the month moved forward to Poros. The organising, at short notice, of the Maintenance Staff to accompany these flotillas, arranging for their transport by sea and for subsequent supplies of spares and stores, has been another interesting event in the history of Mediterranean Coastal Forces, to which all concerned — Staff officers, Base staffs and boats — have reacted with enthusiasm.
17. Meanwhile, on the other side of the Aegean, another advanced operating base had been established in Khios, and M.T.B’s of 10th/27th Flotilla and Eastern Mediterranean M.L’s moved up to operate from there. The M.L’s and special service H.D.M.L’s have been kept busy mounting Raiding Force sorties to speed the enemy’s evacuation of the Aegean islands and as food relief ships.
18. Written reports of the various operations and proceedings have not yet been received, but, from signals and verbal accounts, it is believed that Coastal Forces satisfactorily performed all the tasks allotted to them. In the brief period of offensive operations before the enemy’s evacuation of Athens, two successes were scored by the 60th M. G.B. Flotilla, operating from Poros. On the night of 7th/8th October, three boats, led by Lt. C.J. Jorram, R.N.V.R., in M.T.B. 667, sank one E-boat and one R-boat and damaged a transport with gunfire. M.T.B. 667’s torpedoes (the other two boats were gun-boats) unfortunately missed. On the next night two gun-boats, led by Lt. Cdr. B.L. Bourne, R.N.V.R., destroyed by setting her on fire a small tanker of between 500 1000 tons. We suffered no damage or casualties in either of these actions. But on the 5th October H.D.M.L. 1227, while proceeding to take off a reconnaissance party from an island, was unluckily caught by an enemy force believed to have consisted of two torpedo boats. Our M.G.B.’s who were some miles off, observed an engagement and closed the position, to find H.D.M.L. 1127 blazing from stem to stern and no sign of any survivors. From enemy broadcasts however, it is believed that some of her company are prisoners of war.
It would seem from what is written above that Coastal Forces were in the process of trying to establish themselves in the Aegean in September 1944, and whereas it's possible that SIMI II encountered one of the early patrols, I've yet to find any evidence for that. I know that in the Adriatic, Coastal Forces took to boarding caïques there, and capturing them as 'prizes', rather than sinking them, and that they were generally reluctant to expend torpedoes on such a target.
If I do manage to clarify any details for you I will post them here.
Regards
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