Entry clearance - Valid From

[vsumanam]

Hi,

I've recently got my visa issued on 01-May and the vignette on the passport says the following.

Valid From: 27-May-2019
Valid To: 26-Jun-2019

Does that mean that I can enter UK between the above dates?
Or since the visa is issued on 01-May, I need to enter with in 30 days i.e. 30-May.

Can someone please clarify this?

[CR001]

Does that mean that I can enter UK between the above dates?

Yes.

Or since the visa is issued on 01-May, I need to enter with in 30 days i.e. 30-May.

It is the visa vignette dates that count.