A controlled explosion has been carried out on a World War Two bomb found near Kingston University, the Metropolitan Police said.
The unexploded device was found on a building site on Thursday morning.
Nearly 1,500 homes were also evacuated and the Met warned some may be without gas and electricity while surveyors carried out checks.
Police cordons in the Kingston area will remain in place while the site is assessed, the Met added.
The controlled explosion was carried out by the armed forces’ specialist Explosive Ordinance Disposal team.
On Thursday, Kingston Council confirmed two polling stations being used for the European elections had to be shut while the bomb was being dealt with.
Students and staff from Kingston University’s Penrhyn Road and Knights Park campuses, as well as the University’s nursery and some student halls, have been affected by the cordon.