A company is obligated to trade up until the following are activated at the SAME time for a PLC a statement to the city and appointment of the receivers. This typically happens about 07.30 UK time for many GB businesses.
The elephant in the room here is Grey Bull they may be about to pull the plug - they have been looking for a buyer for some time and they want their money for their next venture "steel"
Grey Bull may have given the CAA early warning
Just a quick heads up right now Monarch has just three scheduled departures from the UK left today to Ibiza from Manchester/Gatwick and Birmingham. If these leave on time and are a back over night by 7.30am ALL the fleet should back in the UK real tragedy emerging if true.