Although NI's 1926 Census forms were lost, surviving data gives a snapshot of society at the time.
Italians born in Rome may have accidently selected the Roma ethnicity category in the country's last census, officials say.
One in nine people in Scotland reported having a mental health condition - more than double the figure for a decade ago.
Households who rent from private sector landlords rise by almost 10% in a decade.
There were 100,000 more single-person households than in the previous census a decade ago.
Almost 184,000 people identify as lesbian, gay or bisexual, census data has revealed for the first time.
Data from the 2022 Scotland census shows half of all veterans in Scotland are over the age of 65.
For the first time, the figure was higher than for those who said they held a religious faith.
From freedom to fulfilment, LGBT+ people tell the BBC why they were drawn to their religions.
