B787 Dreamliner Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 0; Flight Crew Total 9136; Flight Crew Type 0
Situational Awareness; Training / Qualification; Confusion; Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Ground Event / Encounter Person / Animal / Bird
Air Traffic Control Separated Traffic; Flight Crew Took Evasive Action
Human Factors; Procedure
First; the biggest threat to the flight was that I hadn't flown in a little over a year; zero hours. This was due to COVID related reduction in flying at my airline. This flight was my first flight on Operator Experience (OE).We were cleared to line up and wait on Runway XXY at ZZZ. A regional jet was also cleared to line up and wait on Runway XXZ. The tower frequency was busy due to landing traffic on the crossing runway and communication between tower and a previously departed aircraft reporting bird activity. I haven't flown at ZZZ for a long time and had forgotten that they normally clear the smaller aircraft to takeoff before the heavy due to wake turbulence. Tower cleared the regional jet for takeoff and in the busyness my brain processed the clearance as ours. The last factor for me was we were right in the middle of transferring the aircraft from the captain to me and so the radio call; acknowledging the takeoff clearance I thought I heard; got dropped. I don't recollect making it. In addition; I failed to verbalize; verify and monitor the clearance with the captain.When tower saw us begin our takeoff roll prematurely; they cancelled our takeoff clearance and we rejected the takeoff at very low speed...I estimate 50 knots. We acknowledged; cleared the runway and taxied back to XXY. The following takeoff was uneventful.Lastly; we noticed on our second takeoff that red lights on the runway were illuminated in front of us prior to getting takeoff clearance. They extinguished when we received takeoff clearance. The lights were not used for our first takeoff.
First Officer reported a rejected take off after mishearing a take off clearance as theirs; that was meant for another aircraft.