A school has written to parents explaining why they were not told the head teacher had been arrested on suspicion of possessing indecent images of children.

Tim Watson, 54, of Cliffe Woods Primary, was arrested on April 20. The letter was sent out on Friday after we reported on Mr Watson’s arrest.

It is understood he had been on personal leave since Easter. Parents were previously sent a letter on May 21, which said he had taken leave of absence from school for personal reasons “until further notice”.

The View Road school’s interim head Amanda Weallans wrote: “As has been reported, it can be confirmed that there is a current investigation involving Mr Watson, a member of staff at the academy.

“We can confirm we are in close liaison with the police on this matter. There is no indication that any individual child from Cliffe Woods Primary is involved.”

Parents expressed their anger on social media on Friday that the school had not informed them of the investigation before the article appeared in the paper.

In the letter, Mrs Weallans apologised for not contacting parents earlier but said the school was following advice from police.

She added: “I will endeavour to keep you updated on any further developments in accordance with guidance from the police.”

Parents have also received a letter from chairman of governors Dianne Foreman confirming that Mrs Weallans, who was special educational needs co-ordinator at the school, had been appointed as interim head teacher.

The letter said: “Once again, I wish to thank you all for your continued support and encouragement during what has been a very difficult time for all involved.”

A police spokesman said: “A 54-year-old man from Gillingham was arrested on suspicion of possessing indecent images of children on April 20 and bailed pending further inquiries until August 6.”

The school, which has 336 pupils aged four to 11, was rated outstanding by Ofsted following a recent inspection. Mr Watson, the head teacher since 2006, was described as “an inspirational leader”.

Dr Gary Holden, executive principal of the Williamson Trust, said Mr Watson was away from school for personal reasons. He refused to discuss the matter further.

When approached at his home, Mr Watson said: “I don’t know what you are talking about.”