Pyrotechnics display

we've at the ' Midlands Air Festival' at Ragley Hall for the weekend as balloon crew. There was no balloon flying today but we did manage to watch the fabulous evening pyrotechnic display.  I've not seen anything like this before where the aircraft send fireworks into the air as they fly. The main photo is of a group called 'airborne composites' and the extra is of 'Otto the helicopter'.