The Guardian has an article on its website about Andrew Mitchell stepping in to help have a trading ban lifted in Ghana, despite it being outside his remit. The firm had been banned from trading for allegedly smuggling cocoa.
This would appear to be evidence that the International Development Secretary has overstepped the mark. It remains to be seen what will come of it.
You can read the full article here: http://www.guardian.co.uk/politics/2010/oct/31/andrew-mitchell-ghana-cocoa-armajaro