Claudia Lawrence’s mother appeals for help 13 years after disappearance

Claudia Lawrence never arrived for work at the University of York, where she was a chef, in March 2009. Photograph: North Yorkshire Police/PA

The mother of the missing university chef Claudia Lawrence has said “if you give up on hope, you may as well give up altogether” as she marked the 13th anniversary of her daughter’s disappearance.

Lawrence, 35, has not been seen since she failed to turn up for work at the University of York in March 2009.