This is an extract from a letter allegedly written by Leading Seaman Faye Turney while in Iranian custody.
It was addressed to her parents and was shown on Iranian television, alongside footage of her being interviewed.
There is no independent evidence that the letter is genuine or whether it was written willingly.
"Dear Mum and Dad,
I am writing to you from Iran where I am being held. I will try to explain to you the best what has happened.
We were out in the boats when we were arrested by Iranian forces as we had apparently gone into Iranian waters.
I wish we hadn't because then I'd be home with you all right now.
I am so sorry we did, because I know we wouldn't be here now if we hadn't. I want you all to know that I am well and safe. I am being well looked after.
I am fed three meals a day and have a constant supply of fluids.
The people are friendly and hospitable, very compassionate and warm.
I have written a letter to the Iranian people to apologise for us entering into their waters.
Please don't worry about me, I am staying strong."