O/T Thomas Cook gone bust...,

[wrinkly]

Since they're package holidays they're covered by ABTA so should get their money back.

They aren't all package holidays though. Some are flight only bookings. Flight only customers are not usually protected by ATOL but the Government has guaranteed to get everyone back, ATOL covered or not. The problem is that people who have booked accommodation etc. separately are not covered for those costs unless their own insurance covers it - not always the case.