In a normal year the UK Used car market is between 7.3 and 8m units. SO quite substantial. The biggest issue affecting the next 12-24 months will be the comparative shortage of Used cars ages 1-3 years. This is is a factor of the last two years market volumes impacted by COVID and to a lesser extent Brexit. Overlay the current semi-conductor shortages and you have consecutive new car markets of c1.7m units. Thats historically 6-700k units less than a "normal" market. Multiply by three and by 2023 you have c2m less "young" used cars in the market place. Thats a problem and in my opinion the reason why we aren't going to see a rapid correction. The biggest thing that could drive it would an oversupply of new vehicles but that looks unlikely with the OEMs having to balance not only profit and volume but also CO2.