According to "NewsWhip" (they specialise in Social Media):-
The BBC is...
"Best on Twitter
#1 - Regular readers of this blog won’t be surprised in the slightest by our inclusion of the BBC as the best Twitter publisher in 2014.
They’ve managed to take top spot in the Twitter rankings every single month, while consistently producing some of the most-tweeted news stories each month. This year, their flagship Breaking News account hit 10 million followers, then 12 million.
Throughout 2014, the BBC regularly broke some of the biggest news stories of the year to their enormous audience on Twitter, setting new standards for real-time reporting on social media.
Their social media team is one of the most innovative around, so it’s always interesting to try and keep up with what they might come up with next."
More about the report and "NewsWhip" may be found
here.