Yeah, when the Barbados government publish their daily COVID stats they also publish an explanation of the new cases (gender, age, where they came from how they were tested etc) as well as any discharges, number of tests that day etc.

gisbarbados.gov.bb/COVID-19

So from that and knowing when the ba flights were I checked the dates 1 day after each flight. There was even 1 or 2 that confirmed a case was after the second test was carried out on the affected people on that flight