In Scotland the restrictions placed upon personal census information by various Acts including the 1910 & 1920 Acts were reinforced and strengthened by the Freedom of Information (Scotland) Act 2002, which despite the name of the Act inferring greater freedom of information actually made the "100 year rule" law, which is why we had to wait for the 1911 census long after it was released early in England. Unless there is a massive U turn in Parliament we are unlikely to see anything other than statistical information from the 1921 census until 2021.