The Lammy Review is a 2017 review on discrimination within the policing and criminal justice systems in the UK, led by David Lammy and commissioned by David Cameron and Theresa May. The Lammy Review found significant racial bias in the UK justice system. Key findings Understanding BAME disproportionality Gaps in CJS data impacting accountability The Lammy Review called for the UK criminal justice system (CJS) to have more scrutiny in their data on ethnicity and religion, in order to move towards fairer treatment. It highlighted some gaps in information recorded. These gaps in reporting make it impossible to analyse whether disproportionalities are a result of charging rates, sentencing decisions or reoffending rates. The review concluded that fair treatment was more likely when institutions are open to scrutiny. The courts and Crown Prosecution Service (CPS) do not record religion, which makes it harder to hold them accountable for discrimination. Prisons do record religion and have seen an increase in the number of Muslim prisoners by 50% in the prior ten years, from 8,900 to 13,200, but the lack on data at the courts and CPS obscure this fact. Muslims make up 15% of the prison population despite making up only 5% of the overall population. Since information on religion is not recorded at the earlier stages of the CJS, too little is known to determine the true cause of this disproportionality. The Lammy Review proved that this significant increase in prisoners could not be linked to terrorism offences, because only 175 Muslims were convicted of terrorism-related offences between 2001 and 2012 (less than 1% of the Muslim prison population). Despite this the most prominent frustration of Muslim prisoners has been found to be stereotypical portrayals of Islam, leading to unfair treatment and higher levels of restraint and segregation being used against them by staff. Gypsies, Roma and Irish travellers are estimated to account for 5% of male prisoners, despite accounting for only 0.1% of the UK population, however this is not covered in the official CJS monitoring systems. Leaving this information out could be particularly damaging to a vulnerable group, since the Lammy Review also found that 27% of Gypsy, Roma and Traveller prisoners reported feeling depressed or suicidal on arrival compared with 15% of all prisoners. Furthermore only 35% received information on what support was available to them compared to 44% of all prisoners. Relative Rate Index The Lammy Review