Research/Mike Leigh/Outnumbered Dialogue improvisation

In our media studies lessons we discussed the possibility of instead of scripting trying a technique we have learnt about in the theory side used by Mike Leigh.
Michael was the director for our piece and had also completed a research section into directors, one of which was Mike  Leigh.
We decided as a group that it would be a good idea to research into Mike Leighs method of using improvisation instead of scripting and probably use this technique in our trailer.

Mike Leigh:

Born 20 February 1943 (1943-02-20) (age 68)
Brocket Hall, Welwyn, Hertfordshire, England.

 I found this description of what Mike Leigh does on

http://www.thevillager.com/villager_136/themasterofimprovisation.html"

"Mike Leigh has for 40 years now employed his own unique method of starting and building a play or a movie, and he has built plenty of both, gathering praises and prizes along the way. “First, the actors take part without any idea of the process,” he says. “Second, each actor only knows what his character would know." 

I feel that this is a perfect description of Mike Leigh's Non-Scripting Method and descibes the method perfectly.

It makes me wonder if we would be better off using this method rather than the traditional script as due to the nature of our task their should be minimal dialogue, and any peices of dialogue we do use need to be very effective.

I found this clip of Mike Leighs method being discussed on BBC Radio 5 live.

I watched this clip through and it just makes Mike Leighs method intregue me even more, its such an intresting method as it goes against the norm of modern movie making.

A good example example of Mike Leigh's method in action is in this trailer as all the dialogue in it is not scripted..

After researching into mike Leighs method it made me think where else i have seen this method, or a similar method applied.
In the BBC Tv Comedy 'Outnumbered' it was revealed in an article that the three kids in the show are allowed to improvise their own lines.
This can be read in the following BBC article
http://www.guardian.co.uk/media/2008/dec/06/television-bbc

Or alternatively an image of the article is below

To Sum up, i would say i am very intrested in this method and am willing to try it out. I beleive that if done correctly this improvisation method can be used to great effect, and just might be the perfect solution to dialogue in our trailer.