The Independent Office for Police Conduct (IOPC) launched a detailed probe into the allegations against Jaffer and Lewis, which in turn led them to a number of other unrelated but disturbing misconduct cases.

In addition to the evidence about inappropriate photographs being taken by officers, investigators also looked at claims that some others had cheated during a police driving exam.

It is understood officers who had previously sat the written part of an advanced driving course allegedly shared information about the test questions with colleagues who were yet to take the exam.

A spokesman for the IOPC said they had completed their investigations into both cases and had passed details to the Metropolitan Police Service.

Jaffer and Lewis have been found to have a case to answer for gross misconduct, but it is not yet clear whether any of the other officers investigated face disciplinary proceedings.

The revelation that other officers have also been accused of taking images of a dead body while on duty will heap even more pressure on the beleaguered Met, which has faced a string of devastating scandals in recent months.

Scotland Yard is still reeling from the murder of Sarah Everard by Wayne Couzens, a serving Met officer, and is under huge pressure to root out corrupt officers.

Jaffer and Lewis, who as well as taking pictures of the murdered sisters, superimposed a face onto the images and used disparaging language about them, will be sentenced next month and have been warned they face lengthy prison sentences.

Speaking outside the Old Bailey, Mina Smallman, the mother of the two murdered women, called on the Met to “get the rot out of the force once and for all”.