Army bomb disposal teams worked through the night to prepare for the removal of a Second World War device discovered on a building site.
Schools and properties were evacuated on Thursday after the unexploded bomb was found in north-west London, forcing local residents to take shelter in a church overnight.
However, the evacuation area was increased overnight with hundreds of people facing being away from their homes for the weekend.
The bomb, weighing 500lb (227kg), was discovered buried deep at a site in Brondesbury Park, Brent, where construction workers were preparing to build a block of flats, according to reports.
In the early hours of Friday morning, experts from the Royal Engineers and Logistics Corps were constructing a blast protection layer around the device.