Why did you decide to join the pilgrimage?

I think faith is absolutely fascinating and I think at the moment, we're all looking very, very deeply into ourselves: are we happy with this idea of self-determination? Are we happy with this idea that we've created a world that doesn't necessarily need a higher power?

We rely so heavily on technology, on science, it's one of the things that people just simply don't talk about anymore - you really don't talk about it - which is why this programme has always been so fascinating.

What was your highlight from the journey?

It was so incredibly immersive. Above and beyond the different religions and the different faiths, I think the different personalities is the thing that really comes through as the series goes on. It was a lovely thing to do, and the judge was very specific in terms of my parole!

During the journey, there were some very profound moments for all of you, could you say what you learned at the end of it?

I think that the power of the experience was so much to do with the humanity of it: so much to do with us being together, us being supportive, us all doing the same thing, but doing it in different ways, doing it on different terms. And the extraordinary power of the nature that surrounded us. I mean, Scotland - the Highlands - was incredible, but very veiled by mist every now and again. We’d get a little glimpse of a little bit of Glencoe or something like that.

I'm relatively relieved that I came through not having discovered God. I think God feels the same about me as well. I think she's very relieved!

Did you find any moments particularly tough?

The whole thing was obviously deliberately tough, and the point of Pilgrimage is putting you outside of our comfort zone. It always has been. And this was very uncomfortable. However, there's no doubt about it, it was also incredibly awe-inspiring. It's a very overused expression but the nature that we were walking through was absolutely beautiful.

What was the most challenging part of the pilgrimage?

One of the most challenging things was the fact that you've got camera crew in your sleeping bag with you when you wake up in the morning. We developed these very sneaky ways of putting our teeth in without anyone noticing. Doing our mascara before they realised…

I mean, one of the really lovely things is that there was a real sense of destination to the experience.

But I think Saint Columba is an incredibly interesting subject. I'm very interested in Celtic Christianity anyway, but we made discoveries about him and his relevance, including the fact that he's incredibly different in Scotland and Ireland.

Were there any moments when there was any fallout? Or did you just get along the whole time?

I think all of us were very keen to hear the point of view of our comrades. And sometimes people approach that exercise of discourse in a very different way. Sometimes it's a charming and light conversation, sometimes it's a much more forceful, much more passionate experience. Sometimes there can be friction. But the important thing was that we came up the other side of it, it helped us to define ourselves, but much more specifically, it helped us to define our relationships with each other, and our friendships with each other, which is important.