I've only briefly seen a replay (just back from my holidays!) So this is a genuine question.... was it actually intended to be a shoulder charge? I thought it looked like a case of bad timing by Moon combined with Perceval falling forwards in the tackle. If so then it seemed a harsh (but not necessarily unwarranted) red card.

I think plenty of worse challenges escape punishment and suspect the injury was the key factor in the red (not something I generally agree with as intent should be the key factor)

People need to realise that making contact with the shoulder is not necessarily a shoulder charge. Every great tackle should make first contact with the shoulder. Last night's tackle was not a shoulder charge.

Moon made contact with the head of Percival which was a clear penalty (missed by Silverwood), and probably a red card though a fairly harsh one.

I also cannot understand the classification of Moons challenge as a shoulder charge, it was nothing of the sort.

It was contact with the head, and a red card is effectively a subjective call based on whether you believe it was intentional or accidental. On that basis it does seem harsh to be a straight red and not yet another and much more frequently seen on report incident.

Silverwood was at least consistent in his PTB rulings last night; horribly slow, which has been a feature of his refereeing this season.

The difference in penalty counts in each half is an interesting observation, 13 penalties 1st half and 2 2nd half. Did Silverwood receive assessor instructions to referee differently after half time? It certainly worked against Leeds who would have welcomed opportunities to take the 2 second half.