Grieving relatives of Jacintha Saldanha gather for a mass of remembrance at London's Westminster Cathedral on Saturday.

Prayers were offered for the 46-year-old nurse who apparently killed herself - after she took a prank call by two Australian radio DJ's at the hospital where the Duchess of Cambridge was being treated.

Ben Barboza said his wife's death was an "unprecedented tragedy."

SOUNDBITE: Ben Barboza, Jacintha Saldanha's husband

"The events of the past week have shattered our lives and we barely have the strength to withstand the grief and sorrow."

Saldanha, a mother of two, will be buried on Monday in southern India - where she was born.