First time I have ever seen this on a census

[kiterunner]

1921 census entry for the Drummond family of Ashton Under Lyne.
The person who filled in the form got "female" and "male" the wrong way round for the whole family! (Parents and 7 children.)
https://search.findmypast.co.uk/reco...83%2F0439%2F01

He (the householder) also thought he was the enumerator and filled that bit in, but I haven't noticed whether others did that too.

I suppose on previous censuses other than the 1911 we would only see the enumerator's version, but I don't remember seeing something like this on any other 1921 census entries. On the 1911 they just have male and female columns so I suppose there are plenty of mistakes with those.