This document release though isn't a question of transparency. It just exposes UK trade talks with the US and allows people to form an opinion based upon the contents. That isn't the purpose of transparency!
My anger about the documents isn't the exposure of the contents. It is the fact that we have someone who wants to be PM who has proven he would willingly disclose and throw UK interests to the fire for his own political gain. Why should anyone trust Corbyn now considering the type of groups he associates with?
MI5/MI6/GCHQ has recently said that Corbyn would not be suitable to handle classified information, seems to me they have been proven right!