Really unimpress with the refereeing of the ruck.
A few minutes ago, the penalty before Hartley went off, he really should have let go.
Hartley went for the ball, and was half cleared out, and the Leinster player stayed on his legs (fair enough). Hartley had two options: get in a "press up" position, to allow access to the ball, or flop on it, and he did the former. Reddan then picked up the ball and deliberately played it into his harms.
Countless times I've seen referees call something along the lines of "there's nothing he can do/he's trapped, play on".
Think he's far too quick to blow a penalty.
The only positive is that he's equally terrible to both sides.