http://uboat.net/allies/merchants/ships/3388.html
"On 10 Dec, 1944,
U-1202 reported in a radio telegram the sinking of four ships totalling 26000 tons from a convoy.
In fact, only the unescorted
Dan Beard (Master William Robert Wilson) was hit at 13.55 hours by one torpedo in rough seas off Strumble Head, North Wales."
It's kinda hard to mistaken a single unescorted merchant ship for a convoy...