Reports have come in that a boy, aged about 17, smiled awkwardly at a teenaged girl sitting opposite him on a train to St Pancras station when their WiFi signal dropped out as they went through a tunnel at London Bridge.
An eyewitness, Toby Dell, 18, told newsmen: "It was pretty amazing, to be honest. We were all sitting in the carriage looking at our phones, when we lost the connection as we went through a tunnel.
"It was totally unnerving, I don't mind admitting. I didn't know what to do or where to look. I considered looking up shiftily and turning my head to look out of the window, but I didn't want to risk making eye contact with anyone, and, in any case, we were in a tunnel.
"Eventually, I did glance at the window, and saw this young bloke's reflection. There was no doubt in my mind that he smiled briefly at the girl opposite. It was very fleeting, but he definitely did it.
"Using my phone as a kind of mirror, I caught the girl's reflection, and she was smiling back.
"It was one of the most incredible things I've ever witnessed in my life. I was shaken and upset, and had to move to another carriage to compose myself. I mean to say, haven't these people heard of text messaging or WhatsApp?"
This reported incident comes just two weeks after a 14-year-old boy from Whitechapel in East London asked his best friend’s 13-year-old sister if she would be his girlfriend and accompany him to the local cinema while they were sitting next to each other on a wall outside the girl’s home in Leman Street, instead of sending her a Messenger text.