Birmingham has a high vehicle theft rate by comparison to other parts of the UK. Car thieves normally target expensive cars but this kind of crime is by nature opportunistic so if a car is easy to steal, it likely will be.
Park your car in well-lit areas and use a car park with CCTV. Don’t leave valuables on your car seat as it could attract criminals. Don’t leave you car unlocked and unattended. If your are concerned then purchase a steering lock- not only are they effective in immobilising the wheel but this creates a visual deterrent as a thief is more likely to move on to a less difficult car when seeing this addition.