[Grammar] There's + plural noun: informal, ungrammatical, or both?

[Mori]

In an informal style, here's, there's and where's are common with plural nouns:
Here's your keys.
There's some children at the door.
Where's those books I lent you.

Practical English Usage

Is "Here's your keys." ungrammatical? I don't think so, but a colleague of mine (a non-native English teacher) believes such a sentence is both informal and ungrammatical and we had a discussion over it. Is it to do with descriptive vs. prescriptive approaches?

 

[bhaisahab]

Technically it is ungrammatical and it is certainly informal. You will hear it, though.

 

[Mori]

Technically it is ungrammatical and it is certainly informal. You will hear it, though.

Thanks for the answer, but isn't grammar a set of rules inferred, created and modified according to what ordinary native speakers actually use a language?

 

[bhaisahab]

I wouldn't use 'here's your keys' and nor would the majority of people I know.

 

[emsr2d2]

You will come across "Here's/There's" before plural nouns a lot in spoken and informal written BrE. However, the uncontracted versions ("Here is/There is") are not used in the same way.

 

[Mori]

However, the uncontracted versions ("Here is/There is") are not used in the same way.

Actually I knew that. What my colleague and I discussed was whether to label it ungrammatical or not.