A Free British English Spellchecker
Check this out:
Those who want to adhere to British spelling may need it. That's because the spell checkers that PeakD and every other blogging front end on Hive or Steem use mark British spelling where it differs from American as an error.
The default setting on every word processor is American spelling. I've noticed some people I know to have been born and raised in the United Kingdom to sometimes use American spelling and I think it may result from the of the lack of British spell checkers online. Noah Webster's final revenge.