You're absolutely right about Palme, should have wrote "maybe possible but without any proof", but the US and UK did everything they could to stop Sweden, to reduce tensions from and towards the USSR.
There is even a documentary where the Navy's Chief Scienctist John P. Craven (the same guy who was part of Project Azorian and the N1 sub) said they could change the assumed position of Russian submarines, which again (possible but the big smile on his face say's all) led to the stranding of submarine S-363.
A documentary about N1, the part where they could change the position of Russian subs is maybe in this one:
