Stripped and dinning.

[Seymour5]

It's not a stripped shirt FGS, it's a striped shirt. It's not a dinning table either, it's a dining table.

There’s just English & then variations of it.

And those variations have names. One of them is British English.

There is a standard British English. There

Pressed Post by accident. The standard version is just that.
I use the standard version.

The Cambridge Dictionary disagrees with you https://dictionary.cambridge.org/dictionary/english/british-english

So does The Oxford Companion to the English Language www.oxfordreference.com/display/10.1093/acref/9780192800619.001.0001/acref-9780192800619-e-194?p=emailAwwNp5h6zTHDQ&d=/10.1093/acref/9780192800619.001.0001/acref-9780192800619-e-194

"British English" usually means 'standard English'. Standard English - Wikipedia.

Not according to the link you shared. Standard English is the dialect of English that is considered standard in any given English speaking country.

Yes, but as the piece you’ve linked says, Standard English varies depending on location. American English is standard elsewhere, for example.
There is a different standard in Scotland than there is in England/Wales.

I was referring to standard British English.

Which is only standard if you live in Britain…

Well, I’ll go to the foot of our stairs!

Are your stairs in Britain?

Yes, but not just one-syllable words. There are also words like admit > admitted, sequin > sequinned.
It's all about whether you want the vowel sound to be "short", as in the words rat, bet, win, dot, cub, or "long", as heard in rate, beat, wine, dote, cube. (The "long" vowel sound is the letter's alphabet name.) If you want the vowel sound to stay "short" when you add an ending to the word, you have to double the consonant after it.

Sorry - teachers gotta teach!

CVC is easier for kids to remember (also a teacher 👍)