The flat has been plagued by mould issues since they moved in, and large cracks have emerged in the walls. I have a four-year-old and I am literally scared the walls are going to cave in. Mrs Perez said: "I have a four-year-old and I am literally scared the walls are going to cave in. Read moreA council spokesperson said: "Mrs Perez contacted us last week about the cracks that have appeared at her house. No comment was made about the years-long mould issue, which was put to the council by the Welwyn Hatfield Times.