It was a farce - no-one new what was going on especially the flow helpdesk and instead of suspending all atc flight plans we had rolling delays all morning and that really annoys everyone especially the pax. Here's an example of one flights slots!!
STD0720
0745 - for starters
0804
0829
0837
0829
0849
0840
0916
0925
0919
0914 that was good for 45mins but we missed due Flow asking us to hold on the ground until 0930 for a phone call that never arrived...
Flow then called and advised delaying fpl only for us to receive 1329!!
Flight was cancelled and pax taken off a/c and back into the lounge.
Would have made everyone's life easier if it was just suspended indef.