I've just had ten minutes to look at these tweets (and there are a lot more) it looks like the hoteliers have taken the onus on themselves (and rightly so, if they won't be paid), to act. This is the worst case scenario. I didn't even predict this, I predicted a situation with holidaymakers left in their resorts for the duration of their holidays and then repatriated. I didn't forsee that the hotel owners might start turfing folk out. That will be a major problem that might push the bill over the £600m figure.
This could get very interesting in the next 12 hours if its replicated in other resorts.