Helen Anderson, 41, from Finsbury Park, was found by member of the public on the A3 near Guildford on Monday.
Dave Messam, 52, from Hackney, was charged with murder and has been remanded into custody.
A 51-year-old man from Hackney has been released on bail after he was arrested in connection with the murder.
Detectives are appealing for dashcam or smart doorbell footage in the area.
They have also released an image of a decommissioned double decker bus that was seen in the area.
Detective Chief Inspector Emma Vickers, who is investigating the case, said: “We are continuing to appeal for witnesses in relation to this investigation.
“In particular, we would like to speak to anyone who saw a decommissioned double decker Brighton and Hove bus in the North London area between 7.30pm on 20 August and 3pm on 23 August.
“We are also keen to speak to anyone who saw the same bus either driving or stationary in the Guildford area between the hours of 3am and 4am on 23 August.”
Police urged anyone with information to contact them on their public portal or call Crimestoppers on 0800 555 111.
