Both sides are lying?

The 1975 agreement between Iran and Iraq to settle the border in that area has not been updated by the surveys that were to be carried out every decade.

!985 due to Iran/Iraq war, 1995 due to problems with the peace process after the Iran/Iraq war, 2005 due to US invasion of Iraq.

So the territorial waters are disputed by both side. Now saying that you know exactly where the boundary lies is total BS. Iran cannot claim that and neither can the UK.

When the agreed International survey is completed then we could debate
the whys and wherefores of outrageous actions. Until then no-one can say with any precision how far or on which side of the border anyone was.

How do i know? Because I was involved with surveying the straight for the British Military in the 80's.