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Speaker MentorAlastair Campbell had one of UK's top persuasive remits as Tony Blair's Chief Strategist.

"The speaker's got to work out what the main objective is of their speech," Alastair told us. "That's all about the central argument".

Alastair believes that most people will listen to a well structured argument: "If you make a case, founded on factual analysis, values, your own experiences, history, colour... you can usually persuade somebody closer to your case, even if ultimately they're not going to necessarily agree with you".

Dr David Holmes, Lecturer

Dr David Holmes is a Senior Lecturer at Manchester Metropolitan University.

He talked us through the art of persuasion, and the psychology of speaking in public.

David believes a confident speaker can exude an air of credibility; "There's a certain amount of authoritarianism in this," David continued. "If somebody's very demanding and extremely definite about what they're saying, the tendency is that we all nod our heads, regardless of what we all personally thought beforehand".

According to David, non-verbal communication is as important to a speaker as the words they are delivering.

"We've been receiving non-verbal messages longer than we've been receiving language," David told us, "It comes naturally to some people, but other people are not very good at non-verbal communication, and therefore not very persuasive".

Ultimately, persuasion boils down to; "Behaviour, emotion and cognition," David explained. "You've got to get them in the mood, that they're going to be receptive; you've got to deliver the cognitive idea and have them accept that; you then need to get them to do something".

"Once they begin to commit... you've not only got your argument over, they are following that argument and it is now their argument - and they will take it somewhere else".

Len and Arlene talk us through the art of speaking 'in the moment'

Strictly Speaking

Persuasive speakers are often expected to respond to questions about their topic.

Strictly Come Dancing Judges Len Goodman and Arlene Phillips are masters of the bright lights of live television and the pressures of reacting in the moment.

"On Strictly Come Dancing there's no opportunity to be prepared," Len explained to us; "You have to watch what you're seeing, come out with something and hope that people can understand what you're talking about".

Arlene focussed on the possible pitfalls of a 'live' situation: "The worst thing that can happen is that you trip over your words. The very best thing to do if that happens, is to just carry on".

But the most important thing for Len is a natural response: "If you try and false it up, and be something else, it never works and you always come unstuck".

• Define your main objective

• Use factual analysis, values, experiences, history and colour

• Confidence breeds confidence

• Consider what you body's saying

• End with a practical outcome