I've just written a short Benedictus suitable for use with modern Celtic style liturgies. Feel free to use/remix/recycle if you suddenly have a need for a little canticle.
Blessed be God who grants us liberation
who has sent us a Saviour born of David’s line.
Through the prophets he promised
salvation from our enemies,
from hearts filled with hatred.
A merciful sign
This was the promise the Lord made to Abraham;
to free us from our enemies and life full of fear,
and child, you will clear his way and promise God’s forgiveness.
Heaven’s dawn will clear the night of death
and guide our feet to ways of peace.