My UK student visa was issued before my requested travel date, and it was valid for about a month. I just didn't know if the window was different for settlement. My requested date for this one is long passed (hope sprung eternal). We'll see what happens I guess!
It's now the same for all visas valid longer than 6 months.
- Visas valid 6 months or less are issued as a visa sticker valid for the full length of the visa (i.e. visitor visas, fiance visas), so you can enter the UK at any time in those 6 months.
- Visas valid for more than 6 months (i.e. spousal visas, Tier 2 visas, Tier 4 visas valid more than 6 months) are issued in 2 parts:
1) a visa sticker (vignette) in your passport valid for 30 days, for one entry into the UK
2) a plastic BRP ID card valid for the full length of the visa, which you pick up from a designated UK Post Office within 10 days of arriving in the UK
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