Hundreds of inadequate fire doors in the homes of Norwich families will have to be replaced - just two years after they were installed. 

The city council has announced it will have to put new doors in its tower blocks because they “may not perform as required in the event of a fire" with opposition councillors branding the revelation “extremely worrying”.

In total, 454 tower block flats will have doors replaced to meet the correct requirements. 

Eastern Daily Press: Norwich City Council's Normandie TowerNorwich City Council's Normandie Tower (Image: ANTONY KELLY)

In tests, some of the doors fitted up to 2020 showed that they may not stop the spread of fire and smoke for as long as needed. 

The cost to replace the doors has not yet been revealed.

The Labour-led authority says it has put additional safety measures in place, written to everyone affected and is working with the fire service to ensure people are protected.

Some of the doors were put in place as part of an installation programme put in place in 2018 after the Grenfell Tower tragedy, in which more than 70 people died in a London fire. 

At the time 718 doors were replaced at the cost of £670,000. 

The issue is the latest in a long-running safety scandal at Norwich City Council, which saw hundreds of crucial safety inspections of fire, water and electrics not done. 

Following the discovery last year, the authority has accelerated a programme of repairs and inspections at its properties. 

The Green group's Sandra Bogelein, councillor for Mancroft ward, said: “It is extremely worrying that the council has another series of serious safety mistakes on its hands. 

Eastern Daily Press: Sandra BogeleinSandra Bogelein (Image: Archant)“It is right that the council is now treating this urgently, but it is the fourth serious failing in relation to fire, gas, asbestos, electrical and water safety in council properties.

"This is already forecast to cost around £3m." 

Ms Bogelein suggested the replacement doors could cost millions, which should be spent on building new homes.

Eastern Daily Press: City councillor Gail HarrisCity councillor Gail Harris (Image: Sonya Duncan)

Gail Harris, cabinet member for social housing, said the council takes residents' safety extremely seriously and they have worked hard to review all checks.

This has included a thorough fire risk assessment which highlighted issues with front doors in tower blocks.

She said: “All residents have been contacted to let them know we will be replacing all affected doors, free of charge, and installing additional heat alarms in the meantime as an extra precautionary measure.”