Hello, I am attempting to track down more information on the raid on Kupha Nisi that B Coy 11th Batt. RM participated in during 1942 before Op Agreement. So far not much pops up here, IWM, or google. V/R John
Here's a brief mention https://www.royalmarineshistory.com/post/operation-lighter Note that the island name has been very mangled in anglicisation. It's actually Koufonisi. Googling "operation lighter" (include quotes) with 1942 brings up a few more mentions.
Here are two mentions of the raid from two different Royal Marine histories. The histories are: Ladd, D. The Royal Marines 1919-1980. London: Jane’s, 1980. Thompson, Julian. The Royal Marines: From Sea Soldiers to a Special Force. London: Pan Books, 2001.