To apply for a higher-level role, you must possess a higher level qualification, i.e. a university degree in a related subject, for instance, statistics, mathematics, social sciences, computer science, criminology, or psychology.
However, if you have at least 4 or 5 GCSEs at grades 9 to 4 (A* to C) and A-levels, or an equivalent degree, you can start with a lower grade job leading toward this role or apply for an apprenticeship.
For professional development and acknowledgement of your skills and knowledge, an accredited course in relevant topics like criminal intelligence analysis or criminal psychology could help boost your resume and initiate a path for promotion opportunities. You could also learn about GIS, COPLINK, Accurint and other relevant software programs used in the profession beforehand, to give you an edge over your peers.