Scotland Yard said the victim was approached by two suspects who threw a "noxious substance" at him before stealing his mobile phone
https://www.mirror.co.uk/news/uk-new...-kwik-12519019
Meanwhile...
The Mayor of London, Sadiq Khan, is banning junk food advertisements on buses to "reduce the influence and pressure that can be put on children and families to make unhealthy choices".
http://www.bbc.com/news/uk-england-london-44071809