A primary school teacher was facing jail today after she admitted sending sexually explicit text messages to a 14-year-old boy.

Lynn Walls, 42, was suspended by Durham County Council after it emerged she used the interactive computer game Warcraft to befriend the teenager and get his mobile phone number while playing online.

She sent the boy, from London, a series of graphic texts in November 2007 which outlined what she intended to do with him if they met.

Walls was caught out when the teenager's father read them.

At an earlier hearing at Newcastle Crown Court the primary school teacher was warned the offence of inciting a child under 16 to engage in sexual activity was so serious that jail was a possibility.

Releasing Walls on bail, ahead of sentencing, Judge Guy Whitburn said: "This is very, very disturbing."

Walls, of Rose Street East, Penshaw, Sunderland, will be placed on the Sex Offenders' Register for a period yet to be determined.

The judge said: "I warn you this offence is so serious a custodial sentence cannot be ruled out."

A Durham County Council spokeswoman said the teacher worked for the local authority in a primary school and had been suspended.