Parents have called for an investigation into the time a New Zealand teacher spent at a school in Norfolk after he confessed to a second string of sexual offences.

The Eastern Daily Press reported in January how James Parker, who used to teach in Thetford, admitted to 49 sex offences against schoolboys in his native New Zealand.

On Wednesday he pleaded guilty to a further 25 sexual offences.

Parker's offending dates back to 1999, before he came to England, but police in Norfolk have said their counterparts in New Zealand are yet to contact them about the 38-year-old.

The teacher, who will be sentenced next month, taught at Queensway Junior School from April 2002 until June 2003. It has since changed its name to Diamond Academy.

Parents of children taught by him have now called for authorities to investigate any possible offending during his time in England.

One mother, whose son was in Parker's class, said he had been friendly to the parents and 'very touchy-feely' with their sons.

She said: 'I even have photos of him with my son, with his arm around him. No one suspected any wrongdoing.'

Another parent, whose son, a former pupil, was contacted by Parker on Facebook three years ago, said: 'It bothers me there are some families who probably don't even know what he's done.

'If it has happened to somebody here then, for God's sake, let's find out.

'That child might be wandering around thinking they're a one-off and that nobody would believe them.'

Fellow New Zealand traveller and teacher Jo Kunac, who taught at the school with Parker, also told the New Zealand Herald on Sunday that authorities in England should make parents aware.

She said: 'At least every family should be notified – and not just the ones in his class.'

Parker, who lived with his grandmother in Attleborough, has now confessed to 74 sex crimes against 20 boys.

The boys were abused by the teacher during sleepovers at his farm near Kaitaia, northern New Zealand.

An Interpol alert about Parker was issued by the New Zealand police last year, but Norfolk Constabulary were not made aware until contacted by the EDP in January.

New Zealand police are now making a fresh submission through Interpol to Norfolk police, who have not received any complaints about Parker.

In January Ralph Hedley who was the headteacher of Queensway at the time Parker taught at the school said no concerns had been raised about him while Parker was in Norfolk.

He said the school had carried out all the usual checks at the time.

A spokesman for Norfolk County Council also said they carried out the appropriate background checks.

tom.bristow@archant.co.uk