Everyone knows the story by now of the Iranian capture and eventual release of the 15 British sailors and Marines. But the back story or real story I believe is that the Iranians have been acting agressively and the Brits and Americas have been keeping close watch on them. A little news video timeline to demonstrate:
1) Iran back in Feb was violating Iraqi waters in runs to Iraq's main oil export terminal.
So they are asked to leave Iraq's waters with no repercussions but we're left wondering what there up to.
2) Iran's forces a month later ambush and take 15 Brit Naval personnel hostage.
First the Iranians say they don't want to escalate the situation, but immediately make the Sailors and Marines political pawns.
3) Finally the 15 Brits are released.
Framed by the first and last news video stories you can see that the Brits were oviously watching the Iranians closely. They were also doing their duty in protecting the Iraqi oil facilities and looking for smugglers.
To me the Iranians only managed to raise suspicions of there activities even further despite their, all is forgiven, politically calculated pardon.
As for the conduct of the Brit sailors while captive, different topic and no comment.