More than 350 of the UK’s most successful and most promising technologists were invited to Buckingham Palace by the Queen and the Duke of York for Tech at the Palace event, held in early June 2014.
Among the exhibits, Her Majesty Queen Elizabeth II was shown the Raspberry Pi High Altitude Balloon payload developed by licensed UK Amateur Radio operator David Akerman M6RPI (now M0RPI) which transmitted Slow Scan Digital Video (SSDV) signals on 434 MHz from the first “Pi in the Sky“ in 2012.
Her Majesty also saw the TARDIS that was flown by David and Anthony Stirk M0UPU.
Giant leap for radio amateur's Pi-powered teddy bear - http://amsat-uk.org/2013/08/26/giant-leap-for-radio-hams-pi-powered-teddy-bear/
M6RPI Balloon PIE1 – Raspberry Pi Sends Live Images from Near Space - http://amsat-uk.org/2012/07/17/pie1-raspberry-pi-sends-live-images-from-near-space/
Dave Akerman M0RPI - http://www.daveakerman.com/