Hi Paua,
ELAC 1 doesn't fail
Sorry for not being more specific - I mean ELAC 1 will fail to control the elevators when Blue Hyds is lost, then there will be an automatic transfer of control to SEC2.
In the same way that when ELAC2 fails to control the elevators with G + Y Hyds loss, then there's an automatic transfer of control to ELAC 1