A teaching union has called for a full investigation in to a headteacher who told pupils homosexuals and single parents were "flaunting God's rules."

Secondary school head Bill Beales is under fire for his morning assembly remarks at Cwmcarn High School in south Wales.

Geraint Davies of the NASUWT wants an inquiry

He told hundreds of pupils the UK Government was introducing "morally indefensible legislative procedures" and he accused politicians ignoring core values.

But the NASUWT has called for an inquiry; the council leader has called for the teacher to be suspended.

Mr Beales has so far not replied extensively to the calls.

Eroding faith

The physics and maths teacher told many of the Caerphilly school's 1,100 pupils: "Through the thin veneer of political correctness, the fundamental precepts, beliefs and value system of the Christian faith are being eroded by spin doctors and politicians.

"When Christians voice concerns about divorce, unmarried mothers and homosexuality, genetic cloning and many other products of human weakness and desires...

Mr Beales is profiled on the school's website

"... it is not those flaunting God's rules for right living that are placed on trial, but those who apply the word of God to their lives.

"Don't be fooled into thinking that all legislation would be approved by God," he added.

The school's website includes an archive of 100 religious morning assembly speeches.

Union demand

But the National Association of Schoolmasters and Union of Women Teachers has said school governors should look in to the latest comments.

Geraint Davies of the NASUWT said: "I think his words were unwise. Everybody has to face the fact we live in a multi-cultural society, a multi-ethnic society.

""It is a society which has to show toleration. Children in a school should be taught to live as equals. As teachers, we have a moral right to teach everyone equally.

"Lessons need to be learnt from this, which is why there should be a full investigation into the facts of the case."

Governors have thrown their support behind Mr Beales, but Caerphilly County Borough Council leader Lindsay Whittle called for his suspension while an investigation is carried out.

Suspension suggestion

"When I first heard the remarks he had made, I was amazed that a man in such a responsible position could make such comments," she said.

"You cannot place all the ills in the world at the feet of single parents, divorcees and homosexuals.

"The real problems in society are drugs and crime and intolerance."

Cwmcarn High School is a "foundation" school funded by Caerphilly County Borough Council, but managed by the board of governors.

Governors chairman Denver Preece declined to comment but Mr Beales confirmed a teacher had complained about his remarks.

The school is currently on a summer break and pupils will return on 19 June.