A popular teacher who became unwell after hitting her head in an accident at school has been found hanged at her home.

Coroner's officers will investigate whether 55-year-old Anne Davies's head injury had anything to do with her decision to kill herself after her body was discovered at her home in Primrose Lane, Shirley, last Thursday.

Miss Davies, who was umarried and lived alone, hit her head in an accident at Archbishop Tenison School, Selborne Road, in April and was off work for some time following the incident because she was not feeling herself.

The teacher saw doctors after suffering months of tiredness and dizziness, but a CT scan of her head showed no signs of any bleeding to the brain.

She was found hanged at her home on September 22, after worried colleagues went round because they had been unable to get contact her.

Hundreds of students have taken to social networking site Facebook to pay tribute to the much-loved teacher who worked as a cover supervisor at the school since late 2005.

Pupils at the school have agreed to wear black bands on their wrists in tribute and to write the number four on their hands in memory of a necklace she used to wear.

One pupil, Ashlee-Claire Davis wrote: "She was the best sub teacher we could ever have, I am going to miss her" and Simmone Campbell said: "She will always be in out hearts."

Candice Howe added: "Gone but never forgotten," while Sarah Parker simply wrote: "Ms Davies, the true definition of a Tenisonion (sic)."

In a statement, Headteacher Richard Parrish said Miss Davies had played an imperative role at the school, covering lessons in every subject for absent teachers.

He said: "Since Thursday, the whole of our school community has been in deep shock. We cannot escape the sadness of Anne's death. It was sudden and unexpected. The huge sadness felt across the school, and also by former pupils is being expressed in many ways.

"As a colleague Anne was also held in great affection across the staff. Her Welsh humour and honesty, her active interest in the lessons she was taking and her willingness to help out in different situations endeared her to us.

"A book of remembrance has been opened at the school, and once we know the arrangements of her funeral, we will then decide how best we can contribute."

A post mortem examination has been held and a inquest into her death was opened at Croydon Coroners Court and adjourned on September 27.

A police spokesman said they were not treating the death as suspicious.