Still can't believe the tower guys let them takeoff on rwy 02.
Although I guess if the towers controller thought they were backtracking down the rwy for departure on 20 but suddenly they looked up and the aircraft was getting airborne on 02 it could have slipped through.
I can now see how it may happen in BKI.
BKI Tower controllers better be careful watching the aircraft to make sure it's backtracking and not taking off in future
Just lucky it didn't end in tears this time.