Febuary 11 2011
The vampire diaries will be on ITV2
Season 3 is airing now (September) in America just as Season 2 aired in September 2010... In South Africa we only had the opportunity to watch season 2 in Febuary 2011. So my guess is that it will air in January or Febuary 2012 in South Africa.
January 21st
I don't know there is only repeats of Benidorm instead of vampire diaries 
the next episode of season 3 will air january 5,2012
Vampire Diaries doesn't air again in December 2010. The season will continue on January 27, 2011.
It has already aired
September 9, 2010
May 6th
September 9, 2010
September 23rd2010
27th January