Ewan McIntosh:
Johnny Ball presents the HHL08 awards
Ewan McIntosh:
Derek Robertson gets his special achievement award
Ewan McIntosh:
Derek Robertson gets his special achievement award
Ewan McIntosh:
danah boyd at HHL08
Ewan McIntosh:
danah boyd at HHL08
Ewan McIntosh:
Johnny Ball presents the HHL08 awards