Read a story just last week about the sinking of the bismarck.
After it was able to avoid the British navy following sinking of Hood,
It was a cracked enigma transmission that allowed the brits
To realize where bismarck was headed. Without the poles providing
Enigma, bismarck probably escapes.
If Bismark escaped to France, it still would have been wiped out quickly. A lone battleship in the Atlantic with nearly no friendly air cover wasn’t going to last long no matter what happened that particular day