my real issue is we received TB test this month with expires in February and I forgot about that I can apply only 3 months earlier. we plan to be there ( if we get our TIER 1 VISA ) in July. so it means we have to give another TB test as for apply for arrival in July, we should apply in April and ...

Thank you all for useful informations.
So I have one month only to use my visa and can not apply earlier than 3 months.

Hi All, it is written that I can apply only 3 month earlier? what if my documents expires in Febriary but I need to be in there not earlier than June? Can I still apply in February and date in application write in May to be with 3 months but after getting my visa, not go on may and go to UK in June ...