by looking at their addition tapes?
Glyn-
http://www.youtube.com/watch?v=GCW6MzpTU94
Mikey-http://www.youtube.com/watch?v=2Rl5iJEL2hA
Nikki-http://www.youtube.com/watch?v=zML8qgMY9ZQ
Richard-http://www.youtube.com/watch?v=rskAciUMqow
Sezer-http://www.youtube.com/watch?v=VtTpRPZ49eI
Grace-http://www.youtube.com/watch?v=DZxC-0tNk2M
Lisa-http://www.youtube.com/watch?v=wB63TMxRNo4
Pete-http://www.youtube.com/watch?v=FGFdXgWdpc4
George-http://www.youtube.com/watch?v=jX5w0Hzd_lo
Shabazz-http://www.youtube.com/watch?v=yfTCngEkPFo
Lea-http://www.youtube.com/watch?v=QosQG9T9VLo
Imogen-http://www.youtube.com/watch?v=SozMaMUmHeM
Aisleyne-http://www.youtube.com/watch?v=vAcqlaTmjhA
Bonnie-http://www.youtube.com/watch?v=z7hNficAWG8