Here, she tells of her steps towards reconciliation in our weekly Real Time series. Her filmed encounters with Patrick Magee will be shown in the UK on BBC TWO on Thursday at 2100GMT.
My father, Sir Anthony Berry, was one of five people killed in the Brighton bomb attack.
The bomb completely changed me. It suddenly felt that this was what real life was about; that this was how a lot of people lived their lives. It felt like I'd arrived in an awful way, a violent way.
Straight away I felt part of the Northern Ireland conflict. And I knew that I wanted to get as much that was positive out of it as possible.
Before my father died, I was already committed to peace but I was more into meditating than action. That seemed incredibly irrelevant when the bomb went off. Those sides have now integrated in me, the inner and the outer.
Face of an enemy
Patrick Magee, the only bomber convicted of the attack, was released from prison in 1999.
It was always his choice whether to meet me or not, and I honestly didn't think he'd agree to it. I'd talked to other ex-prisoners who said he probably wouldn't - I'd been led to expect that he'd have no need to meet.
So I was very surprised when he agreed. It is unusual after all, to meet the daughter of the man you killed.
We met at his friend's house, a woman who runs a reconciliation charity called Seeds of Hope. She had brought us together. We just started talking straight away and didn't stop for three hours.
That was November a year ago, and since then we've met probably eight times. Sometimes we've spent the weekend together, or been to victims' groups.
On 8 September - just three days before the World Trade Center attack - we attended a peace conference together and shared a platform. It was very powerful. Not so much what we said, but the fact that we were listening to each other. If anything, 11 September has strengthened my commitment to reconciling with him.
'Is it a betrayal?'
My seven-year-old daughter got very angry when she found out I was going to meet the man who had killed grandpa. She wanted to come too. When I wouldn't let her, she asked me to tell Patrick that he's a bad man. She later asked if he was sorry. When I said yes, she asked, 'Does that mean grandpa can come back now?'
There is a part of me that says 'you shouldn't be talking to the man who killed your father'. That voice is still there, the struggle between the side that wants to talk about reconciliation and the side that feels it's a betrayal.
Yet meeting Patrick has put a human face on this conflict. I now see men like him as people with their own struggles, no longer as a faceless enemy, and that helps me. I think it's been quite a struggle for Patrick to see me and my dad as real people rather than as justified targets.
I'm not saying anyone else has to do this, but for me it's important to see the humanity in my enemy. And I agreed to do the BBC documentary because of my commitment to ending this cycle I've been caught up in.