Entered UK on tier 5, but border didnt stamp Vignette

[RAYmo]

Hi All,
So I came into the UK under Tier 5
the border didn't stamp my vignette for some reason
I already have my BRP card, can I work without my passport entry clearance being stamped?
Do you know who I can call to check as well?

Regards,

Ray

[The Station Agent]

Did you perhaps enter via Ireland? You don't get a UK stamp if you enter via Dublin.

You can work if your BRP says so - that is your proof you can work. The visa in the passport is probably only for 1 month anyway, to get you in.