A mum says she is living in a nightmare as her young daughter battles a heart condition in intensive care. Tiffany Smith’s world was turned upside down when Lily Diamond was sent to hospital after taking a turn for the worse a few weeks ago. The youngster was described as being “always on the go at 90mph” before falling ill and needing an emergency transfer to the Royal Brompton Hospital last month. Tiffany, of Roosevelt Avenue in Chatham, has been staying at the hospital with the two-year-old, and she is expected to remain there for another couple of months. Lily has dilated cardiomyopathy – …