Fans of Coronation Street will have been keeping up with the sad storyline featuring Leanne Battersby (played by Jane Danson), who’s turned to a medium to try to contact her late son Oliver.The concept of the afterlife was also the focus of the recent Netflix series Surviving Death, which helped reignite the debate: what happens to us when we die? Some studies show that 50% of us claim to hear the voice of a deceased loved one while grieving – a notion that can bring some comfort.