For those who are not operating through the various European holiday airports, and thought Thomas Cook were gone, you way be surprised to know that ops in full Thomas Cook livery continue, from departure points other than the UK. For example, 767 G-VYGK, in joint Thomas Cook-Condor branding, continues to run these routes. See here
https://www.flightradar24.com/data/aircraft/g-vygk . So that's a Cook's aircraft on the UK register and thus presumably on a UK AOC somehow.
Well done Cooks' German management, who borrowed money to buy German operators, stuck the loans on the UK company, didn't sort out adequate repayments from the continuing German operation, and when they couldn't be repaid declared the UK operation insolvent while those elsewhere continued.
Interesting to see what the receivers make of this, and what they say about the auditors' oversight of the loans back and forth. Likewise those UK holidaymakers whose trips were ruined while those from elsewhere were not.