**UPDATE** I have safely arrived at the UK and entered using my Visitor visa while my T2 visa did not start yet. I have checked with UK embassy before doing this, and at the border control I have told the officer that I'm entering now as a visitor only to see my family (which is why I came before ...

Casa wrote:My understanding is that an existing visitor visa will be automatically cancelled on the system by the issuing overseas post, when the Tier 2 visa is granted.

Thank you, but could you please give me your source?

Wanderer wrote:The latter trumps the former......

May I ask what is your source, thanks.

I couldn't find a definitive answer to this I have just received my Tier 2 visa today, and it starts on 16/7/2017. But I also have a General Visitor visa which is valid till 23/7/2017, and the sticker is still on the passport as it is. Now the question is, my sister's graduation is on 10/7/2017 in ...