NOAA's newest weather satellites have lightning imagers that are providing lots of useful bright light events. I looked, but someone else found a reference to this image. I believe this recorded the minute before 15:21:17. This is the only image showing something (some nighttime images show meteors as streaks), so it's very good confirmation that a meteor exploded high enough so the sound took over a minute before reaching Antrim.
The flash appears to be too far north, but I believe that's due to a parallax issue thanks to the height where meteors explode and the GOES-16 satellite over the equator in its geosynchronous orbit.