There appears to be even more politics surrounding this issue and the irony of the situation is that its all over 0.5km of uninhabited sea water (according to Iran). That's right 0.5km a measurement so small when you think about it, lets just have a good think about it now.. that's 500 meters put into terms its probably 1 lap around a regular track at a schools sports day field. Now what secrets or installments could Iran possibly have hidden in that 500 meters worth of sea they have claimed as their own waters? Maybe its the fish they are trying to protect on their side of the border? No matter how you look at it when you get down to the actual argument there isn't much of case the Iranians are claiming the UK servicemen went 0.5km into Iranian territory the British say they didn't. The Iranians display a GPS device that supposedly proves they (UK servicemen) were, although there was probably nothing to stop the guards  who ambushed the UK Servicemen from taking a new co-ordinate with the device after they had taken it off the UK servicemen. The Iranians of course will ignore any satellite evidence that proves otherwise because now the evidence has become irrelevant it has all become part of a far bigger political game that is pushing the price of oil up and trying to humiliate the British. The letters sent back from Faye Turney added an interesting bit to the end which makes you think the letter was written under pressure which states

"Isn't it time for us to start withdrawing our forces from Iraq and let them determine their own future."

It makes you wonder if the Iranians are trying to turn the public against the British government and hoping this will put pressure on the UK to move away from Iraq? The truth of the matter is now neither government wants to loose face and neither one of them appears to have a way of backing down without doing so. The only other action if diplomacy fails in military action something that neither side will want to see happen and its probably what would have happened if the Iranians had captured US servicemen instead of British. At the moment the only deterrent from a military point of view the British have is the Trident nuclear one and I don't think anyone in the UK government  wants to even think of going there.