Thanks guy's for all the replies.
I have managed to get through to one of the managers of MSF. Who is very helpfull at this moment.
MungoP, not looking for a long time commitment. Just found out via several other people that MSF has people within their ranks who only operate for one month.
Why? Just want to do something for the less fortunate people on this world. Don't think anything is wrong with that? If they allow me to fly for only one month than it will fit comfortably within my leave period.
Thanks again for everybody's help.
FT