A second school in Sussex has been confirmed to have concrete believed to be at risk of collapse.

After extensive survey work earlier this week, Greenway Junior School in Horsham has confirmed the presence of the potentially hazardous reinforced autoclaved aerated concrete (RAAC).

The concrete, used as a building material between the 1950s and 1990s, is now believed to be at risk of collapse following incidents over the summer.

Although the school was closed for all pupils on Tuesday, students were welcomed back the following day for the start of term.

The school was not among those included in a list of education settings with confirmed cases of RAAC published by the Department of Education yesterday.

Pupils are being taught as usual at the school, with adaptations being made due to a closure of the affected area.

A spokesman for GLF Schools Academy Trust, which manages the school, said: “Following survey work, Greenway Junior School has one area that has now been confirmed as containing RAAC.

“The area affected covers one corridor and its adjacent toilets. The area has been closed since Thursday last week.

“GLF Schools is liaising with the Department for Education to confirm the remedial works necessary.

“The headteacher continues to be in contact with parents to confirm the adaptations to where classes are located, but all children are being accommodated elsewhere in school.

“Further information will be provided to parents as longer term plans are clarified with the Department for Education.”

It comes the day after the government confirmed that a school in Eastbourne is among those affected by RAAC, with the unsafe concrete detected in external areas of some buildings.

Students at Langney Primary Academy have had “no loss to learning” due to the issue, with pupils being welcomed back to school for the start of term earlier this week.

The Department for Education’s list of affected schools and colleges identified some 147 locations as having the collapse-prone concrete on site.

Of these, four schools have switched to remote learning for all students, with 19 delaying the start of term as a result of the situation.

Education secretary and MP for Chichester Gillian Keegan said that “the majority” of schools where RAAC has been confirmed have opened to all pupils.

She said: “I know this is the last way parents, teachers and children affected by this wanted to begin the new term, but it will always be my priority to ensure the safety of pupils and staff.”