How Abi has changed the world
I've always been totally honest about who and what I am
Eight years ago Ian Hamilton became Jan Hamilton - making headlines around the world as the first officer in the British army to transition from a man to a woman.
Jan said at the time: ''I looked in the mirror and realised that was the last time I was ever going to look at Ian."
Since then, she has changed her name to Abigail Austen and has rebuilt her life and career.
She joined Lorraine to talk about her new book based on her unique experiences as a senior advisor to the US army, her wedding next year and how she's been a catalyst for change.
Abi told Lorraine she still managed to wear her heels while dodging bullets in war-torn Afghanistan.
''You still wore heels in Afghanistan?," a shocked Lorraine asked, to which Abi replied: ''Of course, I have standards!"
Abi's book Lord Roberts' Valet: Afghanistan Kandahar War: The True Story of Three Years in the Suck is available to buy now.