“Why wouldn't it need 143 diplomatic missions?” is hardly an answer.
So who might need to call on one of those missions? A citizen from an EU country presumably? So why not just visit the embassy of your own country, as has been done for decades by anyone who ever required assistance? At least we’re no longer helping fund such unnecessary nonsense.
It wasn't an answer it was clearly a question.
And diplomats don't just exist in the narrow remit you've just described.
As I said, we may have left but acting like the EU doesn't exist is childish. WR previously had no objections to EU diplomats (we were heavily in favour); we've signed a FTA with the EU less than a month ago as 'Sovereign equals' and now we aren't recognising them as such.
It serves no purpose other than petty posturing. The UK still needs a sensible, good faith, relationship with the EU - we have left the EU but there are a whole range of agreements, transitions, negotiations still to be done.
This, alongside the decision to cease the FREU seem to be an attempt to reduce communication with the EU rather than strengthen it and make it smoother - meaning we will be less able to manage emerging issues...it's counter productive.