her dog. After a rather heated meeting with Tar Robertson, she

eventually revealed the secret code. The death of her dog nearly

caused a massive upset for the D-Day plans.

D-Day

Sergueiew met Kliemann in March 1944 Lisbon to discuss what she

knew about the Allied plans to invade mainland France and to

provide her with the radio to communicate what she was learning in

the UK. They suspected some some locations in France, as well as

Holland and Belgium and it was her job to convince them of the

wrong location. In mid-April 1944 she sent the first encrypted false

message to the Germans in the middle of the night. This marked the

start of almost daily messages that she sent in the run up to D-Day.

While the Germans thought she was travelling over the UK to

source information, Sergueiew was in fact mostly in Bristol with her

friends, recuperating. She passed on messages about tanks and

planes as well as false troop movements. She was able to convince

her German contacts that the invasion was coming in the Pas-de-

Calais area and they strengthened the Atlantic Wall fortifications in

that area accordingly. Her deception had been a success and in the

early hours of the 6

June 1944, the Allied forces landed on the

coast of Normandy, completely surprising the German hierarchy.

Given all the difficulties however, it was no real surprise when she

was dismissed a week after D-Day, having done her job

successfully. However, knowing her codes, MI5 could continue to

transmit pretending to be TREASURE for another five months, and

infinitely easier option. Her long messages were re-encrypted by

the Abwehr, using the German Enigma machines, and transmitted

throughout the Abwehr's network. They provided Bletchley Park

with excellent cribs for the cryptanalysis of the Enigma messages.