In pictures: Marsha's last journey

Police have released CCTV footage of the last bus journey of student Marsha McDonnell, 19, taken minutes before she was beaten to death outside her home in Hampton, south-west London.

Marsha got on the last Kingston-Hounslow bus, number 111, at Kingston at 00:08 GMT on Tuesday 4 February.

She got off at 00:17 GMT at Percy Road just past Priory Road, Hampton. Minutes later she was attacked, and died in hospital.

Police want several men on the bus, including this one, to come forward in case they saw anything. They are not suspects.

This man was on the bus for a few short minutes during Marsha's journey. He sat on the lower deck, as did she.

This man got on at Hampton Court five minutes before Marsha got off. He also sat downstairs, and used a mobile at one point.

This man (left) was on the bus with his friend (right) at about the same time as Marsha. They sat upstairs at the front.

This man got on with his friend at Kingston about one minute after Marsha, and sat at the back upstairs until the last stop.

This man was sitting downstairs for the entirety of Marsha's journey, and got off at the next-to-last stop.

This passenger was on a number 111 going the other way, but passed the spot where Marsha died, minutes beforehand.

This passenger was also on the other bus, the last Hounslow-Kingston service. He got on two minutes before Marsha got off.