No it's the two spaces after a full stop thing. That's fine if you're using a typewriter, but word processors account for the full stop already. The number of over-50 bosses I've had to explain this to since I entered the workplace is maddening.
hmmm, no idea if that is a thing since I rarely use a word processor.
Anyhow, according to the FT,
"Under the new rules centimetres and kilometres are to be dropped in favour of imperial measures, while “untitled” men are to be described in writing as “esquire”, rather than “Mr”."
Utterly daft.