Hello Averil,
I was interested to see that if you were using Ancestry for the 1911 census scan they are still blanking out the infirmity column?
They have made that column available for some time on Findmypast (not that there was anything entered on the scan you showed). Also showing "any recorded details of children born to women in prison who were aged three or under at the time of the census".
I seem to remember that they were excluding the records of people in prison for a while?
Sue