people to be happy with his or her photograph on their ID card," she told the website IranWire, "and this is what makes the campaign interesting."

There has been a strict dress code in place in Iran - particularly for women - since the 1979 revolution, and the response to the challenge seemed at least partially motivated by people wanting to express their true identities.

One Facebook user described the challenge as a demonstration of "the public-vs-private persona."

"I had never imagined sharing my national ID card online," said another.

Next story: After British man abused, Taiwan debates its hidden racism

Image copyright Christopher Hall

Many people in Taiwan thought racism and prejudice didn't exist in their society - until a viral video of a British man and his Taiwanese girlfriend being verbally abusedFlooding hit parts of England and Wales one in every five days last year, the Environment Agency said as it warned of the need to prepare for future extreme weather.

But one in four days were spent in drought, with hosepipe bans imposed for 20 million people across a swathe of England early in the year after two dry winters in a row.

Rivers such as the Tyne, Ouse and Tone went from record low levels to experiencing their highest flows since records began, in the space of four months, the Environment Agency said.

There was flooding on 78 days of the year, and for 95 days there was official drought declared for some areas, figures from the government agency show.

Met Office analysis suggests that the UK could experience a 1976-style