Instagram this morning to share an honest admission about his battle with addiction, in view of his 46,000 followers.The filmmaker began recalling harder times he had faced after stumbling across an old family photo while visiting his mother over the Christmas period.In the snap, Mark could be seen grinning while cradling his and Nadia’s daughter Maddie, now 19, but has now revealed his seemingly happy facial expression was “strained and enforced”.Describing the memory, Mark wrote in the caption: “Found this whilst at my moms earlier this week … and isn’t it weird how a photo triggers countless memories and feelings? “Firstly my Ma was the same age in this photo as I am now … give or take a year. Maddie was just button beanie and still at that stage where every movement of her arms or legs was an echo or tracing of the same movement in her mum’s tummy. “The fridge behind us was (bizarrely) my first ever Xmas gift to Nadia (with whom I was already in the foothills of a relationship about to be blighted by raging addiction) … and then, most troubling is the fact that I can see the strained and enforced smile on the face of a then active alcoholic. “This was me at my most chaotic, out of control and sad.”Mark added: “I knew I had huge reasons to be happy because of our dear dear baby girl - but drink had me in its grip.