The UK was thinking about it last year, but then BTC fell $14000 and they have gone back to 'researching' the topic.
https://www.coindesk.com/bank-of-england-has-no-plans-to-launch-cryptocurrency/
Now BTC has gained $4000 again recently, it's being shunned because they missed the bottom, again:
So in the next year or 2 when the markets are flying again, expect the research to conclude that it does make sense - and hopefully at this point, most of us will not have to care what the Banks' opinion is!