Mar 23, 2011 Downton Abbey:

Downton Abbey: Lady Sybil heads to London in second series of hit
Mar 23, 2011 ... The second series of Downton Abbey, set against the backdrop of WWI, is currently being filmed. Some of the cast have swapped the ...

Source : http://www.dailymail.co.uk/tvshowbiz/article-1369096/Downton-Abbey-Lady-Sybil-heads-London-second-series-hit-ITV-drama.html