Jenny Reeves (@Jennyflyer1) was one of the first to post a picture on Twitter.
And Transport for London sounded the all-clear after the "invasion" had been averted.
The filming of Doctor Who has finished at Westminster Bridge, the Daleks are in the process of being removed.
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As Britain basked in the hottest day of the year (so far), the Met Office sent a warning which took us all by surprise.
James Davis, Laurence Halsted and Richard Kruse make up the squad. Marcus Mepstead is named as the team reserve.
After this morning's fire at Vauxhall 4 of the 8 lines are still closed which means South West Trains is running a limited service.