The presence of potentially dangerous RAAC concrete has been confirmed at 214 schools, the Department for Education has said.
It marks a rise of 41, or 24 per cent on the last list published on September 19, when 173 schools were named.
The data also shows that 99.9 per cent of schools with buildings in the target era for RAAC have completed the government’s questionnaire, which suggests only around 15 schools are yet to respond.
Essex remains the worst-affected area, with 62 schools with confirmed RAAC, followed by Kent with eight, Suffolk and Hertfordshire with seven and Surrey with 6.