British Transport Police confirmed shortly after midday overhead wires “were down” near Paddington and urged passengers not to leave trapped trains. However, images posted on social media showed passengers evacuating trains onto the lines.
Heathrow Express suspended services at around 11.45am on Sunday. Trains resumed at 4.35pm. The operator detailed the situation in a string of tweets.
https://twitter.com/BTPPaddington/status/1056524653861179392