The tram was travelling at a speed of around 70 kilometres per hour as it went round the curve, which had a maximum permitted speed of 20km/h, according to an initial review from the Rail Accident Investigation Branch (RAIB).
Tramvajs līkumā braucis ar ātrumu 70 kilometri stundā, kaut arī atļautais maksimālais ātrums bijis 20 kilometri stundā, teikts Dzelzceļa negadījumu izmeklēšanas nodaļas ziņojumā.