On Tuesday night Kaitlyn Regehr, 30, was on the bus home through west London when she says she was sexually assaulted.

"It was 10:30 at night, it wasn't particularly late. I was on the 207 [bus] going through Shepherd's Bush, when a guy copped my bum," she told BuzzFeed News. "I didn't say anything, I just felt uncomfortable and moved out the way.

"I know that sounds ridiculous, [but] I did what most women would do, just move away, and hope that he doesn't get off the bus and follow you.

"I probably wouldn't have done anything more if [another passenger] hadn't saw it. He told the guy who touched me 'what are you doing?

"The guy intervened and it got a little bit heated, but he was clearly saying it loud enough for the bus to hear. He also said 'Do you have any women in your life? Do you have a mother, a sister?', and I was really touched by that, he kind of humanised the situation. But while I was getting off [the bus], I didn't get to thank him properly."