A poster is being circulated to campsites in France

Dyfed-Powys Police are stepping up a poster campaign at French and Spanish camp sites in the hope tracing a man who is believed to have abducted his four-year-old daughter.

Simon Clayton, from Hay-on-Wye, and his daughter Estelle - known as Esti - have not been seen for a month.

Detectives are awaiting information from Interpol and the French and Spanish officers, who have been checking possible sightings.

A report was received last week that book dealer Mr Clayton - whose estranged wife Aneta lives in Brecon with Esti - had been seen in southern France.

News of the sighting - which was 11 days after Esti disappeared - came in a call from a French resident who claimed to have seen them travelling in the south of the country.

Last week, police started targetting travellers and holidaymakers.

Photographs of the father and daughter were made into a poster and circulated to French police stations and camp sites. Posters are now being distributed in Spain.

Esti went missing after staying with Mr Clayton on 9 April.

He left a note for her mother, Aneta, saying he was taking their daughter on a three-week holiday.

Police officers suspect that Mr Clayton acted to avoid going through a planned court hearing over custody.

It is believed father and daughter boarded a ferry to Caen in France from Portsmouth on the day they disappeared.

Mr Clayton was due to appear at a court hearing in Brecon, at which a residence order was granted to Estelle's mother, Aneta.

Investigations have shown he had withdrawn several thousands of pounds before making the trip.

It has also been discovered that he is no longer paying the rent on his house near Hay-on-Wye and has made arrangements for his pets to be cared for.

Police checks on his computer have revealed that he had previously researched the subject of child abduction on the internet.

Officers from Dyfed-Powys Police are appealing to anyone travelling to Europe or Morocco to report any sightings of a red Volkswagen Caravelle, registration number A276 OFJ.