I want to create a spy story but I lack political or military knowledge to build a solid plot.
France discovers that the prototype of one of his last torpedoes, F21 « Artémis », has been stolen while moving from the torpedo factory in Saint-Tropez. After an accident at the toll booth blocked by the Yellow Vests at La Ciotat, the gendarmerie brigade discovers in the trunk of the smashed van a tank of air that is supposed to be in the place of the explosive charge (or the explosive charge itself ). With regard to what they find in the van they leave on the track of a flight from the Libyan rebellion to sink the government fleet (the driver was a former British agent or an informer?).
However, finally the gendarmes conclude that it might be the British. They would want France to be responsible, pay the heavy past of their cooperation during the civil war of Libya. In truth it will be an internal betrayal of a nationalist admiral who has all committed to France back to power.
The problem is that I can not justify the passage when the Gendarmerie thinks it is Libyan responsibilities to the British's. Especially since in the end it is not their responsibility.
Why would a country be involuntarily involved in stealing prototype weapons of another allied one ?
I thought about : - A former or actual British spy. But if it is a spy who stole the torpedo, then why would he do it as far as the countries are allies ? For money to sell it to the Lybian rebels ? But what would be the reason - An informant - industries ?