17-04-2022, 10:26 AM
(This post was last modified: 17-04-2022, 11:46 AM by Colin Morgan.)
Looking at the DVLA dataset of UK registered vehicles - all 20MB of it - which can be downloaded (VEH0220 [2016]), this gives:
Austins Registered by DVLA 500-750cc 750-1000cc
AUSTIN SEVEN Petrol 1144 889
AUSTIN MISSING Petrol 1774 3582
Splitting the data at 750cc does not help, as Sevens will end up in both categories? Also included will be A30 Sevens and Mini Sevens as there is no distinction in the data. Many other types of Austin will be included in the MISSING category so an unknown proportion of these are Sevens. There is no '7' as a number category in the dataset, nor a 'Ruby' category, nor any further detail - so Sevens are presumably in 'Seven', or 'MISSING' or missing off the data?
This data puts the total number of Sevens registered as being anywhere between 1000-2000 and up to about 6000 - so this isn't a lot of use to determine roadworthy Seven numbers? And that is without counting random recording errors, which are also dotted through the data - such as, for example, four 'Sevens' in the 1200-1300cc category.
So perhaps a better guess is to take about twice as many survivors as are on the Chassis Register - say 20,000 in total - given that some owners specifically do not want their cars listed, and unlisted cars often turn up for sale? If about 20% of surviving chassis are actually registered for the road, perhaps up to 4000 Austin Sevens are currently registered for the road? (The proportion of cars on the road could be checked by taking a sample from the register and seeing what proportion are currently registered.)
Austins Registered by DVLA 500-750cc 750-1000cc
AUSTIN SEVEN Petrol 1144 889
AUSTIN MISSING Petrol 1774 3582
Splitting the data at 750cc does not help, as Sevens will end up in both categories? Also included will be A30 Sevens and Mini Sevens as there is no distinction in the data. Many other types of Austin will be included in the MISSING category so an unknown proportion of these are Sevens. There is no '7' as a number category in the dataset, nor a 'Ruby' category, nor any further detail - so Sevens are presumably in 'Seven', or 'MISSING' or missing off the data?
This data puts the total number of Sevens registered as being anywhere between 1000-2000 and up to about 6000 - so this isn't a lot of use to determine roadworthy Seven numbers? And that is without counting random recording errors, which are also dotted through the data - such as, for example, four 'Sevens' in the 1200-1300cc category.
So perhaps a better guess is to take about twice as many survivors as are on the Chassis Register - say 20,000 in total - given that some owners specifically do not want their cars listed, and unlisted cars often turn up for sale? If about 20% of surviving chassis are actually registered for the road, perhaps up to 4000 Austin Sevens are currently registered for the road? (The proportion of cars on the road could be checked by taking a sample from the register and seeing what proportion are currently registered.)