Meanwhile, an investigation has found that hundreds of towers across England were discovered to have fire safety flaws including broken fire doors and holes that could help blazes spread.New figures uncovered by Inside Housing on fire risk assessments (FRAs) at 436 social housing blocks revealed nearly a third (268) had fire doors that were damaged, unable to close properly or of an inadequate standard.The trade magazine found 71 blocks had been identified as suffering from a lack or deficiency of emergency lighting in stairwells or communal areas, which could hamper the escape of tenants.At 73 buildings, residents were either offered no safety information for fires or it was unclear or incorrect, the investigation found. Police do not have the power to arrest individuals under the offence of corporate manslaughter, but someone can face gross negligence manslaughter charges if a death may have been caused by an act or omission on their part.The Metropolitan Police said the letter was “simply an update on the investigation so far” and “should not be taken to conclude that the identified offences and organisations are the only offences, organisations or individuals that are being investigated”. The revelation comes after campaigners called for individuals to be prosecuted over the Grenfell Tower fire. Scotland Yard said it had “reasonable grounds” to suspect corporate manslaughter offences may have been committed.Residents affected by the blaze have been told senior figures from Kensington and Chelsea Council and the Kensington and Chelsea Tenant Management Organisation will face formal police interviews. A nationwide safety operation was launched to establish how many buildings were clad in material similar to that blamed for aiding the Grenfell Tower fire’s spread, exposing hundreds potentially at risk. The news was cautiously welcomed by campaigners, who urged the Metropolitan Police to also consider gross negligence manslaughter charges against individuals. In a letter updating residents on the criminal investigation, the force said: “We have seized a huge amount of material and taken a large number of witness statements.