I can't fully answer this for GB cars, because it's really complicated. First of all, we had (in the EU), "General Safety Regulation 2", which incorporated a whole load of driver aids, some of them more helpful than others! Things like Advanced Emergency Braking systems for solid objects and other vehicles - that feature that randomly jabs the brakes when you least suspect it. From the 7th of July this year, all new vehicles first registered in the EU, need to have that system, but augmented to be able to detect pedestrians and cyclists. There are other features like Lane Keep Assist (mandatory from 2022) and Emergency Lane Keep Assist, and Intelligent Speed Assist, Driver Drowsiness and Attention Warning, Event Data Recorders...etc. I can get a complete list and the implementation dates if you want... There are two complications though. 1. Vehicles manufactured before the deadline but not registered before the deadline can, at the discretion of the EU Member State it is being registered in, apply for an "end-of-series derogation". This would give them an extra 12 months after the deadline to register those cars. That makes it really difficult to know which cars are likely to have which of those features, if only judging by the registration date. 2. The UK left the EU, (except Northern Ireland, in effect), so none of these measures are mandatory in GB yet. However, it is not illegal to fit them, and a lot of manufacturers can't be bothered making a different spec of car for GB alone, so they fit them anyway! The GB government does intend to align with the EU regulations and bring this in shortly, but hasn't done so yet. If you can get to see a Certificate of Conformity for any vehicle that you're interested in, Field 54 contains a load of acronyms and abbreviations of what driver aids that particular car is fitted with.