The OG of Thatcham Category 2 Immobilisers has to be the Cobra Touchkey. That isn't to say it's a bad thing there is a lot to be said about the old and the bold.

Through intercepting two critical electrical circuits in your vehicle you can stop thieves dead in their tracks. This thatcham category 2 immobiliser system is the cutting edge of category 2 immobilisers

By touching a key into a discreetly installed into your dashboard you can start your car. When the system is armed a LED light illuminates

Fully included in the price is fitting at your home or workplace, insurance certification and two key fobs.