how to fix the beginning date

[gotoengland]

hi, everyone!
i've got a question, pls help.
if i obtain the hsmp approval letter, how to fix the beginning date of the first year in the uk? it should be the date on the hsmp approval letter, or the date on the visa on which i am approved to enter the uk?
thanxs a lot.

[Mobig]

Very simple, its the date of visa stamped on your passport.