Given three days to wrap it up and stop asking for more time to "investigate", the DPP realized that he would be laughed at if he did not charge these people. So his decision seems to be to charge them now and have the matter drag on long enough for people to forget. Probably "reasonable", given the corner he found himself in. It will be interesting to see what happens when there is a bail hearing and the coppers must give an indication of what evidence they actually have.