Thanks Ali, your message is really helpful and I have also managed to find the record from my bank statement that Home Office took my payment on 25 Mar 2009, which I'm sure can be taken as approval.

When you said "covering letter", is it the one issued by the Home Office?

Dilip_gem, Thanks for the reply, it's really helpful and does ease my stress out a bit. My concern is where can I prove my granted visa was based on the rules that were in place before 31-Mar-2009. I'm worrying that they can just reject my extension application by stating I'm not as the date on the ...

Hi Ali and dilip_gem, I found this post via google as I'm facing the same situation. Currently holding Tier 1 General and applying for an extension before it expires on 19 May 2012. I only have a Bachelor degree. I believe my original Tier 1 was applied before 31st March 2009 but the date on my visa ...