Mortals tells a story of best friendship between two Yorkshire women, Cat and Mags – formed the day they bonded on a geography field trip and capable of weathering pretty much any storm.

Cat and Mags are 21st century northern women. They do what they want, say what they want and behave how they want – well that’s what they think anyway.

But, as they grow up, fertility and family-starting becomes something they see completely differently to each other and it exposes all the cracks in their friendship.

When one agrees to have a baby for the other, their friendship will be tested to its limits. Is it true what they say, that you really can trust your best friend to look out for you above anybody else?