In pictures: Cyber-security challenge UK

14 March 2014 Last updated at 16:55

The cyber-security challenge is an "ultra-realistic simulation" developed by cyber-security experts.
Participants sit by a computer screen
The cyber-security challenge UK is an "ultra-realistic simulation" developed by cyber security experts from BT, GCHQ, the National Crime Agency and others.
Cyber Challenge participants
Simulated news reports informed the teams that London's financial district was under attack and online banking was inaccessible.
Team working together
Teams were tasked with giving regular briefings to a panel which would report to the "government".
Laptop user
The challenge is aimed at bringing talented people into the cyber-security profession to address what is described as a "critical" skills shortage.
Participants being assessed
Participants are assessed by professionals throughout the challenge on their technical ability, communication skills and leadership.
Team working together
More than 40 finalists are taking part in the 48 hour challenge which simulates a major cyber-attack on the UK. Teams are presented with a scenario and asked to find out as much as possible about the nature of the threat.
The challenge winner will be announced as the cyber-security challenge UK champion on Saturday evening. Registration will open for the next set of challenges as soon as this one finishes.