First off, you should know that the UK Police mark a vehicle for various reasons. Depending on the reason, there are different types of “police markers.” For instance, “Section 59 markers” are put on vehicles engaged in anti-social behaviour like illegal off-road driving, continual breaking traffic laws, etc. Similarly, the Police assign a stolen vehicle marker to pinched cars. Whenever a theft-status vehicle is found on the road, the cameras quickly flag them on the screens. If you happen to buy such a car unknowingly and take it on any UK road, you will be pulled over very soon.
Unfortunately, you cannot find if a car has a police-marker on it unless you run a police car check. All Police-marked vehicles are entered in Police National Database (PND), and we fetch data directly from it when you buy our police marker check service.