Peter McNaught, operations director for the Victoria Lines, said:
Our engineers have worked tirelessly through the night and have successfully repaired the damaged signalling equipment.
A good service is now operating across the Victoria line.
We again apologise to our customers who were affected by yesterday’s disruption.
More top news
The unexploded bomb was found near the Houses of Parliament and led to disruption in central London overnight.
Led by Quo frontman Francis Rossi, Parfitt's band mate for 50 years, the group's current line-up joined mourners at Woking Crematorium.
Currently the Ealing Council has a huge shortage of suitable space and sees these steel well insulated boxes as a cheaper alternative.