Your visa (vignette or digital status) will have a start and end date (valid from/valid to). It is very important that you travel to the UK on or after the start date.
If you travel to the UK before the start date on your visa then you will be entering the UK as a visitor and will not have permission to work in the UK.
If you have been granted a vignette which is valid for 30 or 90 days, then you must enter the UK during this period otherwise you will have to apply, and pay, for a replacement vignette.
The UKVI also advises that you should not book travel to the UK until you have your visa.
Arriving at the border
Global Talent visa holders and their dependants will usually have their passports and vignettes checked by immigration officials when arriving in the UK. Certain nationalities will receive an ink stamp on their passport which confirms their date of entry.
If you have a biometric passport and are a national of an EU country, Australia, Canada, Iceland, Japan, Liechtenstein, New Zealand, Norway, Singapore, South Korea, Switzerland or the USA, you will be able to enter the UK using an eGate. If you are travelling with children under 12 years old, you will not be able to use the eGates.
If you enter the UK through an eGate, you will not speak with an immigration official and your passport won’t be stamped. It is important that you keep additional evidence of your entry to the UK, for example, a flight ticket or boarding pass.