This is in the Telegraph and the Mail. Telegraph includes commentary on the "what's is your sex" question:
www.telegraph.co.uk/politics/2022/04/26/botched-scottish-census-could-produce-useless-data-one-four/
"SNP ministers and National Records of Scotland (NRS), who run the census, are facing growing scrutiny over their decision to delay it for a year, blaming Covid, meaning it was out of sync with the rest of the UK.
There have been claims that IT glitches, a perceived political bias to questions and a controversial decision to allow people to self-declare their own sex have also contributed to the poor return rates.
Elsewhere in the UK, 97 per cent of households responded to the census last year."
www.dailymail.co.uk/news/article-10758461/Nicola-Sturgeon-facing-census-shambles-700-000-households-warned-1-000-fines.html
"a former head of health analysis at the Office for National Statistics, has warned a significant number of unreturned census forms could render the process 'useless'.
'A census with such a significant proportion missing is useless as its main purpose is to get an accurate assessment of how many live within the country which is used to allocate money for local services,' he told the Telegraph."