Two things people routinely get slightly wrong on Mumsnet that set your teeth on edge and which you would ban....

[CurlewKate]

Mine are "nickname" when you mean "shortening" and "double-barrelled" when you mean "hyphenated"

You've highlighted another good one.

English people forgetting/ not caring that there are 3 other countries in the UK that operate their own systems, including for education.

Ect instead of Etc

Using bring and take incorrectly

Nodding

Both mentioned already- Draw instead of drawer. Brought instead of bought.

But if it is the context of education, it’s easy to say what year they are in

People who accuse others of drip feeding and people who accuse others of performance parenting. Both of them give me the rage.

Also calling a lot of Scottish things (use of gotten, Santa, celebrating Halloween) “Americanisms”.

“Year 6” is often relevant when discussing an 11 year old though because it makes a difference to the advice eg walking home to an empty house compared to a child at secondary school.

Our schools broke up last week for the summer holidays, it always brings out confusion.

Year 6 and 7 would both be primary school here.

Think, instead of such as, eg or like. 'I had popped into the supermarket for a few items, think cucumbers, shower gel and dishwasher tabs, when...' Sometimes it's followed by something more vague, as if a more specific detail will out the poster. 'I had popped into the supermarket for a few items, think food and toiletries and cleaning supplies, when...'

Ect. I don't know how it happens. It can't be autocorrect, and c and t are not close enough on the keyboard to fumble them like this.

Draws instead of drawers

Why not say my 13 year old year 6 child? That way everyone gets it and you might even get better range of responses.

This

‘Makes my teeth itch’ genuinely makes me teeth itch and I’m not just saying that to be funny 😄

As pp said, ‘que’ instead of queue or cue. It’s not hard. I don’t think que is even a word in English??

Using the verb cringe, as an adjective, rather than cringeworthy. And even then, they're not really using it quite right.

'I find it so cringe'
Or
'I thought it was really cringey'.
Or
'Mr Birling is properly cringe when he says the Titanic won't sink. '

Yes, yes, I know language change in action etc., but there are so many other words that work much better.

"They was living there for a couple of years" FFS it's WERE - how bloody hard is that? It's the most basic grammar.

And yes to 'myself' - gives me the rage.

Saying someone has been given "free reign"
Has nothing to do with reckless monarchy, and everything to do with horses.
When riding, if you give your horse a "free" ie loose rein, it can do as it pleases.

It's because people pronounce it 'eksetra'. I do remember writing ect when I was in primary school, because I don't think I'd seen it written down.

Came on here to say this one!

Everything mentioned so far!
Apostrophes for plurals on the name board. For example, "there are lots of little Mabel's in reception class at the moment..."

Also your instead of you're.

Breath instead of breathe. Fucking irritating!

For me it's when people mix up 'borrowed' and 'lent'.

"He borrowed me some money"

No, no he didn't.

It's your lookout! No it really isn't! It's luck. This really winds me up as it just doesn't make any sense.

Posting in Chat or AIBU when pedant's corner would be more appropriate.

This. Really hate it. It's everywhere nowadays, but seems specially popular on Mumsnet.