As a BCO i would, and have accepted this several times as an acceptable MOE from a bedroom so long as the window is of sufficient size, not more than 1100mm from floor, access is not obstructed by anything permanent in the room and the window supports itself when opened.
However, this is a common sense interpretation of the regs and i could not guarantee that another BCO would be of the same opinion, you would definately have to check it out with your inspector first.