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

🇬🇧 G-STBO - Boeing 777 300ER - British Airways BAW97A/BA97A, London Heathrow (LHR) to George Bush Intcntl/Houston (IAH) - 4.2 mi away @ 35475 ft, heading SSW at 570 mph. Spotted once before! [06:08:41 PM CDT] #407994 #G_STBO #B77W #SPEEDBIRD #BAW97A #BA97A #ADSB #ADSBbot