While discussing this question (Does light have an unending journey?) I stumbled on the fact that light's speed is constant only in inertial frame.
What I happened to do was add up the expansion of universe to the theory. It goes as follows:
Suppose from a source we emit a photon, at the same time, we (source) are moving away from the point of launch and so is the point that too with acceleration, now lets consider the moment when we are so far from the point of fire that the distance between the 2 points (source and firing point) is so much that the space with their respect to each other is moving with speed more than speed of light, certainly since the points are also constantly being separated they have a relative velocity of separation which just happens to be more than speed of light, now by the time the fired photon must have travelled even further and its speed now with respect to the source must be greater than speed of light.
Can this be taken as a prove for the variance of speed of light from inertial frames?