>>1025320According to the RAIB (
https://www.gov.uk/government/news/fatal-tram-accident-in-croydon), it was running Wimbledon-bound, so no switch was involved.
Video related shows a long 80 km/h stretch after which comes a sharp 20 km/h left turn in which the crash happened.
https://www.youtube.com/watch?v=lhuogCAh6Pg&t=12m56s