CCTV released in search for attacker who sexually assaulted 11-year-old girl in UK

Detectives in England have released a CCTV still of a man suspected of sexually assaulting an 11-year-old girl.
The schoolgirl was waiting for a bus at around 4.20pm on January 11 on Alder Grove in Dollis Hill, north west London, when a man started a conversation with her.