'Let's not...' or 'Don't let us...'?

[Mehrgan]

Hi all,
I'd appreciate it if anyone could tell me whether the second one is still common in BrE or not. Many thanks, in advance!

[Rover_KE]

'Is the second one still common in BrE?'

I don't think it ever was common.

Rover

[tedtmc]

'Is the second one still common in BrE?'

I don't think it ever was common.

Rover

Why not?

Don't let us wait unnecessarily.

not a teacher

[bhaisahab]

Why not?

not a teacher

Because it's not, we just don't commonly say that.

[Verona_82]

What a nice question! I've been wondering about 'let's not" and "don't let's" too.

M. Swan writes: "Negatives are let us not / do not let us (formal); let's not / don't let's (informal).
Do not let us forget those who came before us (formal)
Don't let's stay up too late tonight (informal)

[Mehrgan]

I remember once I read that was/is one of the differences between the AmE and BrE. Well now I'm convinced, because when the native speakers don't think so, then it is not SO! Ta!

[Verona_82]

Do you want to say "don't let's" is AmE?

[Mehrgan]

Do you want to say "don't let's" is AmE?

No I don't! 'Don't let's...' was said to be more common in BrE, which is not the case as we see in this page.

[tedtmc]

Don't let's stay up too late tonight.
Don't let us wait unnecessarily

.

I don't understand why they are considered uncommon.

[Mehrgan]

.

I don't understand why they are considered uncommon.

Dear tedtmc, I'm sure I read it was the common form in BrE, but language is what its speaker say, not what written in some texts. Apparently it could be used, but it's not as that common as we think.