Solo singer Jahmene Douglas and boy band Union J are the third and fourth acts of The X Factor 2012 alumni to sign a record deal with Sony, following Ella Henderson and winner James Arthur.

The X factor Press account tweeted this morning: "@JahmeneDouglas and @Ella__Henderson have both signed for Sony. Congratulations!! #xfactor"

Henderson and Union J revealed the news of their deals at the weekend on The Saturday Night Show in Ireland and at a gig in Cardiff on ...