Gina London on how body language can influence other people's opinions of you

Often people form an opinion of you before you even open your mouth, says communications expert and CNN veteran Gina London. She tells Áilín Quinlan why she needs to watch her body language

She was a confident, high-powered marketing executive with a multi-national company — and well used to speaking publicly.

Then she attended a workshop on effective communication where she was recorded making a short speech.