Linda
If as some have stated that the infamous Jet2 ( can't organise a p**s up in a brewery) HR dept get involved they will likely conclude that the crew should have gone around after the first bounce following WS or diverted to TFS in the first place,all very easy after the event and I'm sure the crew would probably agree, again with the benefit of hindsight.
Surely any SMS would have a safety investigation which depending on recomendation may go Flight Operations. Nothing to do with HR unless Flight Ops ask them to get involved