A 52-year-old man was approached by another man on the evening of April the 9th on a train from London Bridge.
The man repeatedly hit the passenger in the head when he refused to hand over his phone before running off.
The next afternoon, a 72-year-old man was on a static train at London Bridge when a man approached him and snatched his phone.
The day after that, a 25-year-old woman was travelling from Honor Oak Park to Clapham Junction station when she was approached.
The man demanded her phone and threatened to stab her and frightened for her safety, she handed the device over.
