Anthony John Felton, 54 from Swansea pleaded guilty to attacking Deputy Headteacher Richard Pike with a spanner after discovering he was having an affair with the same female teacher.
Police were called to the school on Wednesday 5 March after Felton delivered “a number of blows” with a spanner to Mr Pyke, which had all been caught on CCTV.
Mr Pyke has since been discharged from hospital after suffering minor injuries.
Felton spoke only to confirm his name and enter his plea as he appeared by video-link from prison.
Following Felton’s guilty plea, Judge Paul Thomas KC at Swansea Crown Court said the offence was so serious that only a prison sentence could be justified.
Judge Thomas said: “In the context of where and how this offence was committed, and in particular, bearing in mind the propensity of violence in schools perpetrated by pupils, it seems to me that my public duty require that only a prison sentence can be passed here.”
Felton was appointed headteacher at the 900-pupil school in March 2023 having worked at the school since 2001, initially as the Head of Mathematics according to his LinkedIn profile.
Prior to the attack, Felton had emailed staff at the school apologising “for the distress which the rest of today will bring.”
Felton will remain in custody until he is sentenced on 25 April.
(Lead image: St Joseph’s Roman Catholic Comprehensive School)
