Even if you are accused of a crime, but you are not charged or convicted, the police can still hold information about you in their local and national databases. This can include fingerprint information and information regarding the allegations, which may be false. These allegations and cautions may appear on certain enhanced DBS checks. This could cause problems if you are applying for jobs, in particular those that require enhanced checks such as working for the civil service or with vulnerable adults.
According to the Data Protection Act 2018, data can only be stored by a public body such as the police if it is reasonable and proportionate for them to do so. There is a process by which you can apply to remove your information from the courts database through the application to ACRO criminal records office.