Police in Spain have arrested Britain's most wanted woman after nine years on the run.

47-year-old Sarah P. was caught by Civil Guard officers while walking her dogs in the village of Santa Bárbara between Barcelona and Valencia on Sunday, the police said on Tuesday.

According to their own statements, the British criminal police had been looking for P. since 2013 for money laundering and tax fraud.

She is said to have belonged to a gang of 16 who bought mobile phones abroad without VAT and then resold them in the UK.

According to the investigators, the gang made more than a billion pounds (1.2 billion euros) profit.

Woman was responsible for money laundering in a gang

The 47-year-old, from Fulford, near the northern English city of York, disappeared in May 2013 before being found guilty and sentenced in absentia to eight years in prison.

According to investigators from the British tax authority, she was responsible for money laundering in the gang and invested all of the group's earnings in companies in Spain, Andorra and Dubai.

According to the police, P. was the last member of the gang to be caught.

In 2015, the police found out that she lived in Olivella, south of Barcelona.

However, upon realizing that the police were after her, she changed her appearance and place of residence and severed all ties with her family in England.

Seven years later, the police got a tip.

After a lengthy surveillance operation, investigators in Santa Bárbara discovered a woman "who clearly had the same physical characteristics," police said.

To ensure that she did not escape, several plainclothes officers were involved in her arrest.