There are two main areas of concern: The structural design of large panel system blocks is weak, they could collapse in an explosion, high wind or serious fire. There are frequently gaps between floor and wall panels, these gaps prevent the flats from containing a fire for one hour and lead to the risk of serious fire spread. The highest risk blocks are those with gas in them. Why is this an issue now? Because of the Grenfell fire, tenants, landlords and independent experts h