Do I need to show stage 1 endorsement letter to immigration officer

Hi All,

Due to covid, I was unable to travel to UK immediately after obtaining the Global talent visa which was assigned to me on 4th Jan(endorsement) /01-March(visa for 3 months). I am traveling to Uk early next month(4th April) as the vignette assigned to me is still valid. However, the stage 1 endorsement letter is expiring by 3rd April. Will this be a problem and do I need to show the valid stage 1 endorsement letter to immigration officer at heathrow!

What is the expiry date of your vignette and global talent visa?
If you already got your visa, the endorsement letter validity is not an issue.