When your visa has been processed, you will be given a 30-day window to enter the UK (a 30-day visa vignette in your passport). They will use the date you put on the application form to determine what date your 30 days will start.
- If the visa is processed before the date you put down, then it will normally be made valid starting 7 days before the date you entered.
- If the date passes and the visa has not been issued yet, then it will usually start about 7 days after the date the decision is made.
For example:
- if you put January 1st 2020, and your visa is issued on December 20th, your 30 days should be: December 25th 2019 to January 24th 2020
- but if you put January 1st 2020 and your visa is not issued until January 15th 2020, then your 30 days to enter the UK should be around: January 22nd - February 21st 2020.