"The death of a loved one is a hollowing experience."
Once vilified as the person who broke up the Beatles, Yoko Ono is finally being recognised as a treasure, for her commitment to peace, her solo work and her unwritten contribution to much of John Lennon's work. As her peace tower shines its beacon into the stratosphere from Iceland's capital, Elizabeth Aubrey talks to Ono about the new, archive version of 'Imagine', and why women in art are finally being recognised.