Hello Thomas and Andrzej,

There were no special operations carried out by British submarines in Yugoslavia after 1941. The only special operation by Allied submarines in the Adriatic in 1944 were those carried out by Italian submarines. All on the Italian coast except that one was made on the Yugoslav coast: Nichelio landed seven agents from ISLD (MI6) during the nights of 29/30 March and 30/31 March. The landings were carried out successfully and without incident.

It does not appear that the action related in Brockdorff's book is correct.

All the best,

Platon