Relatives of teacher Jane Longhurst have made an emotional plea a month after her disappearance: "Please help end our nightmare."

Jane's sister, Sue Barnett, broke down in tears as she begged anyone with information to come forward.

She said: "Someone, somewhere must know something. You just don't disappear from the face of the earth."

Today, we are backing a police campaign to end her family's ordeal.

We are asking all of our readers: Find her.

Miss Longhurst, 31, vanished from her home in Shaftesbury Road, Brighton, a month ago yesterday.

Police fear she has been kidnapped and murdered. They have offered a £5,000 reward to find her.

The Argus has joined the effort, printing hundreds of posters to be distributed throughout Sussex.

Miss Longhurst's mother, Liz, told a Press conference yesterday the hardest part was not knowing what had become of her daughter.

She said: "We are increasingly worried ... we are expecting the worst and want to know what has happened, no matter how hard it is to accept.

"We want the nightmare to come to an end."

Miss Longhurst's partner, Malcolm Sentance, 34, an education welfare officer, looked gaunt and tired as he told how he had been weeping during sleepless nights.

Friends and family had been brilliant to him in the past few weeks but he was "living a meaningless life at the moment".

He was pleased to be taking part in the Press conference because he was doing something tangible to help.

Miss Longhurst, a teacher at Uplands School for children with learning difficulties in Hollingdean, Brighton, played the viola and was active in several orchestras in Sussex.

Her mother said: "Jane was a devoted daughter and sister and was in a long-term relationship.

"We know she would not have left her life behind out of choice."

Anyone with information should contact the Operation Keen incident room at Brighton police station on 0845 6070999.