The theft in Charter Avenue involved 'keyless' car theft. This is a sophisticated form of theft that is possible with some models of car in which a pair of thieves can activate a key fob to unlock the car even if the key is within someone's house.
This is a video of such a theft taking place in Solihull that was filmed on the householder's security camera...
Keyless car theft can be reduced by storing the key inside a Faraday bag. This is a simple bag with a metal mesh lining.
These are available from Amazon (and other suppliers) for around £8. There are many different brands available.