What is the collective nouns for labourers?

There isn't one single, universally accepted collective noun for labourers. However, here are a few options depending on the context:

Formal:

* A crew of labourers

* A gang of labourers

* A team of labourers

* A workforce of labourers

Informal:

* A bunch of labourers

* A squad of labourers

* A group of labourers

The best choice depends on the specific situation and the desired tone. For example, "crew" might be used for a group working on a construction project, while "gang" could be used for a group of workers in a more casual setting.