Yoko Ono admitted yesterday that she is still mourning the death of John Lennon.

The musician was speaking at a conference in London on International Widows Day, 25 years after Lennon was shot by a crazed fan in New York.

"I still cannot get used to the idea," she explained. "It's not just me, but my son who is still suffering from the loss. The subject of widowhood remains taboo. It's not an issue to be swept under the rug."