Could Britain have baited the German ships into a convoy ambush?

How could Britain have baited Scharnhorst and Gneisenau into attacking a convoy?

Use believable radio traffic, ideally from a controlled German agent who appears to be reporting the convoy's position and a ship to avoid.

The answer stresses that bait must reveal a convoy without looking deliberately planted. A fake urgent message about a prominent passenger creates political and credibility problems, while implausible technical trouble would not deceive experienced analysts. A controlled German agent reporting from the convoy offers the strongest possibility because Britain had penetrated the German spy network. Even then, Britain would need the convoy's timing and radio behavior to look routine enough to survive German scrutiny. A purpose-built decoy convoy also consumes escorts and merchant ships without guaranteeing that the raiders will take the bait.