Flights PMI>LHR>LAS in April. The first flight time was changed and the LHR connection dropped from 75 to 70 minutes. On both the BA and IB sites it shows the problem, but AA (who iT was booked through) have no warnings, nor have made contact. The change was made a few weeks or even months ago.

What happens if I don't contact AA? Other flights the same or either different days don't really work for us. If we had to go earlier, we would need to also come back earlier.

Ideally we would like to continue with the current flights (even though we missed the same connection last year due the ATC meltdown), or if not possible, probably cancel everything.

Any advice? TIA