Back in January on The World at One (I think), there was a man from the ONS talking about the census.
He said that they get informed about -
births,
deaths,
number of people paying tax,
number of people paying NI,
number of people paying Council Tax,
number of people claiming benefits,
number of people in hospital, length of stay and type of treatment,
the number of schools and the number of pupils and their ages,
the number of care homes and the number of residents,
the number of vehicles paying road tax and the number SORN,
the gross number of households receiving gas/water/electricity,
the number of households with a landline,
from statutory authorities.
Then there were amenities that report - libraries, leisure complexes and anywhere else that counts the number of people going in and out.
Oh, I forgot 999. The number of call outs and the level of seriousness.
I am sure he mentioned motorway usage and times of the day. And something about prosecutions, type of crime and sentencing.
They know most of this stuff already.
Regards
Chas