Millions of mobile phone users regularly pay extra charges when they do not need to, according to a consumer watchdog.

Which? Mobile found an estimated 10 million users pay for extra calls, texts and data usage on top of their monthly line rental.

The consumer group said the findings were "not surprising" considering an estimated six million people did not know, or had only a vague idea, of their monthly limit for call minutes, while five million were unsure of their text and data allowances.

Millions of mobile phone users regularly pay extra charges when they do not need to, according to a consumer watchdog.

Which? Mobile found an estimated 10 million users pay for extra calls, texts and data usage on top of their monthly line rental.

The consumer group said the findings were "not surprising" considering an estimated six million people did not know, or had only a vague idea, of their monthly limit for call minutes, while five million were unsure of their text and data allowances.

Nanotechnology experts have unveiled a Christmas card so small that more than 8,000 of them could fit on a first-class stamp.

The card produced by the University of Glasgow, said to be the smallest in the world, is invisible to the naked eye.

The university's school of engineering drew up the design, pictured below, to highlight its "world-leading" nanotechnology expertise.

The UK is a nation obsessed with The X Factor and football, if the topics most frequently discussed on Facebook are anything to go by.

This year the social networking site saw a greater rise in status updates referring to the World Cup, the reality show contestants Wagner and Cher and footballer Wayne Rooney than those mentioning any other topic.

One Direction, the boy band X Factor finalists, were the fifth fastest growing topic, according to the figures released today by the website.

An increasing number of people are risking burglary by giving away their whereabouts on social networking sites, a report warned today.

Communicating on sites like Facebook is like having a conversation in a loud voice "down the pub" and you "never know who might be listening", the report said.

New location-based services such as Facebook, Places and Foursquare, which allow people to update their whereabouts, are increasing the risk, according to the Digital Criminal report prepared by Legal & General, with the help of reformed burglar Michael Fraser.

These sites and the easy availability of residential addresses for sale on the internet can be used to create a list of targets.

A sad day for all fans of British innovation and technology sees a final flypast of that most excellent design - the Harrier jump jet.

In what is likely to be one of their last appearances a formation of four flew over the Imperial War Museum in Duxford this week, captured in the image above.

The MoD has decided to scrap the Harrier fleet to save money...leaving our aircraft carriers without any fast jet capability.

Regardless of what anyone might think of that decision it's also sad to see a design which is a standard bearer for British innovation and design, and which we even sold to the American military, being pensioned off.

Stalkers are using GPS tracking technology and mobile phone applications to track their victims, prosecutors said today.

The tactic, already seen in the United States, involves using websites and mobile apps to pinpoint victims' locations using their mobile phones.

So-called cyberstalking is becoming even more of a problem than traditional stalking in Britain, the Crown Prosecution Service (CPS) said.

Nazir Afzal, the CPS director responsible for stalking and harassment cases, told the London Evening Standard: "What we are coming to appreciate is how the cyber element has increased so substantially.

The last thing that more than 70% of British adults will do before they go to bed is check social network sites, figures show.

Instead of curling up with a good book before nodding off, 72% of adults check status updates on Facebook, a study conducted on behalf of Travelodge found.

The questionnaire, asked of 6,000 adults, also found that 18% of adults send a daily night-time tweet to their followers.

The average amount of time spent on social networks while between the sheets is 16 minutes.
Experts said the online activity performed from bed is affecting people's sleep.

Hollywood stars Jeff Bridges and Olivia Wilde braved the bitterly cold temperatures for the UK premiere of Tron: Legacy.

The House actress, 26, who plays fearless warrior Quorra in the 3D film, wore a one-shouldered sequinned Armani minidress and Stella McCartney heels as she arrived at the Empire cinema in London's West End last night.

"She looks amazing, doesn't she?" said Bridges, giving her a hug.

Bridges, 61, admitted he had doubts about reprising his role as video game developer Kevin Flynn in the long-awaited sequel, 28 years after the 1982 original.

"I had a little bit of hesitation. They assured me it wasn't just beautiful eye candy and it would be a good story," he said.

"They came up with one and I am thrilled with it. It's wonderful. I had heard the rumours for so long."

He promised fans wouldn't be disappointed with the follow-up.

"It's a real ride," he added.

Joining Bridges in Tron: Legacy is original cast member Bruce Boxleitner as his colleague Alan Bradley.

Director Joseph Kosinski said: "It was really important to have a connection to the original film. Jeff Bridges, you know, is one of the best actors working today."

In Tron: Legacy, which opens in cinemas on Friday December 17, Kevin's son (Garrett Hedlund) goes in search of his missing dad (Bridges) and finds himself pulled into the cyber universe, where Kevin had been trapped for 20 years.

The general election was the most searched-for news topic of the year, it was revealed today.
It beat the second most popular story that users of AOL UK searched for - the "cat bin woman" who ended up in court after putting a pet in a wheelie bin.

Despite only being announced recently, the news Prince William and Kate Middleton are to marry came in third and is already being predicted as the top news story of 2011 by those who use the website.

In world news, the saga of the Chilean miners trapped underground before being dramatically rescued topped the list.