Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇬🇧 G-STBK - Boeing 777 336ER - British Airways BAW97A/BA97A, London Heathrow (LHR) to George Bush Intcntl/Houston (IAH) - 4.5 mi away @ 37325 ft, heading SSW at 548 mph. Spotted once before! [06:08:52 PM CDT] #406B0A #G_STBK #B77W #SPEEDBIRD #BAW97A #BA97A #ADSB #ADSBbot