A church-going nurse accused of possessing child abuse videos was arrested after a tip-off from Yahoo in America, a court has heard.

Georgina Stober, 46, of Wrythe Lane, was detained at her home after extreme images and videos were backed up onto a 'cloud'.

It was flagged up by the internet giant which alerted the authorities in the States. They passed on the IP address to the Met Police after it was traced to the Stober home in Carshalton, Croydon Crown Court heard.

The material, which was found in a folder called 'x-rate' on Stober's phone, included videos of sex with children as young as two and videos of people engaging in sexual activity with a number of animals including a cat, dog, cow, snake, fish and pig.

When quizzed by officers the Lambeth community nurse admitted she had seen images of female genital mutilation for 'cultural reasons'.

She also admitted she had been sent an image of a pastor having sex with a goat but denied any knowledge of the five child abuse videos and six bestiality videos found on her phone and laptop.

Jane Carpenter, prosecuting, said: ''Authorities in the USA were alerted and they notified the police.

''They obtained a search warrant and attended the address on January 27 last year at 6.30am.

''The door was opened by Mr Stober (her husband), police showed him the warrant and they entered. He told police he did not have any knowledge about the images or the email addresses.

''They then spoke to Mrs Stober, they explained they were police officers. She confirmed they were her email accounts.

''It was explained that indecent images had been uploaded via one of the email addresses.''

Police executed a search of the property and seized one Toshiba laptop and a Samsung Galaxy phone.

After forensic examination of Stober's phone, four category A child abuse videos were found, one category B and six extreme pornography videos showing bestiality, the court heard.

Stober was arrested for a second time on April 6 and quizzed about the findings.

Ms Carpenter said: ''She said she had never seen extreme porn and had never seen indecent images of children.''

The defence argued that as Mrs Stober's laptop was not password-protected it could have been accessed by others such as her two sons who were then 11 and 15 or her husband who also lived in the house.

It was also pointed out that while files were on Stober's phone there was no evidence to show that she had created or downloaded them.

Defending, Philip Misner said: ''We don't know who created them, simply that they have been created.''

The jury heard Stober was an "avid WhatsApper" and could not keep track of the messages, pictures and videos - sometimes up to a hundred a day - that she received.

Reading a transcript of what Stober said when she was arrested, Ms Carpenter said: ''I have different contacts on my phone. I am in church groups and family groups, I get hundreds of WhatsApp messages.

''When some of them arrive they are black and you cannot see what you have been sent.

''If I see anything like that (indecent images) i would delete it and I would say why are people doing that.

''I am just in shock.'

Stober told the court: ''I am not very good on my phone, I always ask for help. My sons are my tech guys who can help me do things.

''I do not know about the x-rate folder, I was not aware it was there.''

Stober denies the charges of possessing indecent images of children and extreme pornography.

The trial continues.