http://www.thebigbangfair.co.uk/home.cfm
The Big Bang is the largest celebration of science, technology, engineering and maths for young people in the UK
http://research.microsoft.com/en-us/um/cambridge/events/thinkcomputerscience/
Annual event showcasing the work of computer science researchers, to educate and enthuse students about the field of computer science
http://mathsjam.com/confindex.html
MathsJam is a weekend meet-up for maths &puzzles enthusiasts
http://www.animex.net/
Animex International Animation and VFX Festival Teeside, England
http://www.fmx.de/home.html
FMX International Conference on Animation, Effects, Games and Transmedia , Stuttgart, Germany
http://www.annecy.org/home
Annecy International Animated Film Festival, Annecy, France
http://s2012.siggraph.org/
International Conference and Exhibition on Computer Graphics and Interactive Techniques, Various, USA
http://www.londonsciencefestival.com/
The London Science Festival
http://www.eurographics2012.it/
Annual Conference of the European Association for Computer Graphics in Cagliari, Sardinia, Italy.
https://cybersecuritychallenge.org.uk/
Cyber Security Challenge runs national online competitions and raises awareness of cyber learning opportunities and careers. It is designed to excite, inspire and help talented people, of any age, to follow a career in cyber security.
http://www.cipher.maths.soton.ac.uk/
The National Cipher Challenge is an online code-breaking competition for UK schools,run by the mathematics department at the University of Southampton. The competition is run annually throughout the autumn term with graded challenges published periodically over a period of three months. The messages to be broken are the episodes in an adventure story, enriched with ideas from science, history and engineering. Solutions are published throughout so that those who are struggling can still follow.
http://www.youngeng.org/index.asp?page=55
Young Engineer for Britain is ` national engineering and technology competition that celebrates creative projects from UK students aged 12-19. It provides both a regional and national showcase for student’s projects where they can demonstrate their ingenuity either as individuals or in teams.
http://animation12.cs.manchester.ac.uk/
Animation 12 is a computer animation competition open to UK schoolchildren. It challenges children to create their own animations, as part of a drive to inspire the next generation of computer scientists.