Me and my cousin, Leeanne, were the best of friends even before we were born. During our mother’s pregnancies we spent many days slumped on a sofa listening to chuckles and being teased with tea and biscuits.

Just a few weeks separated us, and for twenty-six years we looked after each other and continued to share the special bond we’d always had. When we were kids we used to plan our futures. They were ambitious, a little crazy, but we knew we had one.

Back then we were oblivious to so much and it wouldn't be until we were young adults that we’d realise just how dangerous and frightening the world can be.

In Christmas 2013 Leeanne was diagnosed with terminal cancer.

A born fighter, she was adamant that she’d beat it. Each time I went home I watched her body deflate but her spirit wouldn't give up. She was always so brave even though she was dying.

In 2014 she lost her battle – aged just 26. Before she died she told me I had to live my life for the two of us and so I couldn’t turn down the challenge to raise money for such a great cause.

The hardest thing I have ever had to do was carry her coffin at her funeral. A marathon is a challenge, but I know I can do it.