THE father of missing chef Claudia Lawrence will today hold a press conference three months after his daughter's disappearance.

Miss Lawrence, 35, has not been seen since March 18 and failed to turn up for a 6am shift at the University of York, where she worked, the following day.

North Yorkshire Police have since classified their investigation into her disappearance as one of suspected murder.

Peter Lawrence will speak in London, and will be joined by Jo Youle of the charity Missing People as he tries to broaden the search for his daughter, originally from Malton, North Yorkshire.

Earlier this week police searched the Nag's Head pub, just a few doors from Miss Lawrence's home in the York suburb of Heworth, for a second time.

The detective leading the investigation has said he believed Miss Lawrence was involved in relationships of ''complexity and mystery'' and kept elements of her private life secret from friends and family.

Det Supt Ray Galloway said it was vital that men who had a relationship with Miss Lawrence in her adult life came forward to help with the investigation into her disappearance.