Sony Mobile is now rolling out a minor Android 4.2.2 update to the Xperia E1 and Xperia E1 Dual. Bug fixes include the fact that the lock screen locking can now be disabled (it was previously greyed out) and the VPN menu no longer crashes the Settings app.
The Xperia E1 D2005 variant has seen the build number move from 20.1.A.2.14 to 20.1.A.2.19. It is live across a number of carriers in Europe including Vodafone. The Xperia E1 Dual D2105 variant build number moves from 20.1.B.2.15 to version 20.1.B.2.29. The generic firmware is live in France and India at the time of writing.