Turns out it’s a common mistake in BRITISH ENGLISH as well!

It’s been my observation that the most common mistake in American English is the old it’s versus its mistake. Turns out, it’s a pretty common mistake in British English too! And this from a “educational” website; just one of several British English punctuation, grammar, and spelling mistakes.

https://qph.fs.quoracdn.net/main-qimg-4c541a6a6ddc1d059db45204a3f52479