From Pprune.org …

“He mentioned that it was not so much a question of car parking being a problem in canx sunday,but more of a problem with the events “insurers”,(or those involved in such matters),who thought the risk to spectators from “slip and fall” related accidents too risky!!
As for monday departures,he has said that several crews he has spoken to today,are now requesting sunday departures for home,so there may not be too much to see on monday if they get the go ahead.”