Questions with Visa Approval Entry ( Complex)

[usasunshine23]

So great news my son got approved, In my package, I did not get a letter saying it was approved but just the visa stamped saying Valid From 08/01/2020 until 06/04/2020.
Why its that short is because its aligned with my visa expiry of April 6, 2020. We will both do a FLR as soon as possible.

MY QUESTION. Do I have till Jan 8 to enter or do the 30 days start on Jan 8?

Thanks,

[CR001]

1. Yes it expires in line with your visa.

2. He can only enter the UK from 8th January, the valid from date. He can enter anytime from 8th till the expiry date. He doesn't have a 30 day visa vignette.