Like Mary Lamb and Dorothy Wordsworth before them, writers Polly Coles and Liz Jensen have enjoyed many years of friendship. In our first guest interview of 2015, they give us some insights into what makes their relationship work.

SR: How did you become friends?

Liz: Where else but in the Ladies? It was at the wedding of two mutual friends twenty years ago. Polly had already made an impression on me at the ceremony, where she wore a lovely chocolate-brown outfit with a lace collar, and read a poem aloud. Beautifully.

She seemed so serene and poised, which is the exact opposite of how I felt in those days. In the Ladies I overheard her talking to someone – very eloquently and cool-headedly – about the fact that she was writing, and finding it hard. I was writing at the time too, and also finding it hard. So I accosted her.

SR: Can you tell us about some of the ways in which you have you supported each other over the years?

Polly: Soon after we first met we began meeting every few weeks and exchanging chapters of the novels we were then writing. Liz’s work became her first novel, Egg Dancing. Mine was called Utopia Station. I sent it to a couple of agents and then, although I felt it was an honourable first try, I decided that I’d see it as a kind of apprentice piece and go on to a second one. I went through the same process with the next novel and in 2013 I had a non-fiction work published.

After I stopped writing with the same focus as Liz (some time around when my twins were born and I had three kids under three), I went on editing her novels. I hugely enjoy editing and in fact my work as an abridger for Radio 4 is the mother of all edits – massive cuts are needed, whilst one must also retain the continuity of prose style and narrative.

So – it always came easily and pleasurably to me, the more so because Liz is always very generous and appreciative of any help. I think this matters. It’s not that you expect to be acknowledged, but it’d be disingenuous to say it isn’t nice to be appreciated.

SR: Would you say that writing lies at the heart of your friendship?

Liz: As I remember it began as quite a formal writing/editing partnership but it quickly developed, not just because we complement one another so well (she is the wise one, I am the hysteric) but because after a few months of exchanging chapters and editing one another’s first novels, we both fell pregnant. It was a very happy surprise.

Our boys were born just a couple of weeks apart. Quite independently of one another we hit on archangel names: Gabriel and Raphael. Raphael was my second child, and I stopped at two. But Polly went on to have three more babies in quick succession.

So inevitably, our writing careers diverged. Because it happened in such an organic way, it didn’t feel like a problem. That said, with Polly’s writing mostly on hold, and my novels now being published at two-year intervals, there was an imbalance: she was helping me as much as ever, but I wasn’t reciprocating.

I knew one day she’d write something astonishing, and that it would be published: it was something I never, ever doubted. And sure enough, she has: her astute, philosophical, sharp-eyed memoir, The Politics of Washing: Real Life in Venice.

SR: Have you ever experienced any feelings of literary rivalry or envy?

Polly: None whatsoever, which might sound strange, given that she was a rising and active literary star and I, despite my literary aspirations, had taken a very different path. I did do some freelance work over the years, but I was mostly at home with my children and although I never stopped writing, I just never quite got round to pushing myself forward in any significant way.

I suppose success or the absence of it can spawn envy, but as I said, I chose to be a full time mother and I always believed that my time could come, so even there, it just was never an issue. I’m afraid this all sounds rather goody two-shoes. It’s not. It’s just two lives, lived in different ways. And a friendship.

The Politics of Washing: Real Life in Venice by Polly Coles is published by Robert Hale. The Essay – Venice Unravelled, her five programmes on life in modern Venice, was recently broadcast on BBC Radio 3.

Liz Jensen’s latest novel is The Uninvited. She is also the author of The Ninth Life of Louis Drax, which will be released as a film this year. Both books are published by Bloomsbury.