Married Cheyne Phillips, 34, was Deputy Head of PE at Healing Science Academy, Grimsby, North East Lincolnshire, when he started the inappropriate relationships.
In North East Lincolnshire, nearly seven per cent of all births were to women under 20 in 2023, according to figures from the Office for National Statistics (ONS).
Oliver Freeston, a 25-year-old North East Lincolnshire councillor, branded the warning email he received from a compliance officer as an 'attack on free speech'.