'Didn't they try and modernise the Nicene Creed at one point or did I imagine that?'
Something, the RC church has made changes to the Nicene Creed and a few other parts of mass - some of which is wordier and harder to understand than the original (consubstantial anyone?).
Older version
We believe in one God, the Father Almighty,
maker of heaven and earth,
of all that is seen and unseen.
We believe in one Lord, Jesus Christ,
the only Son of God,
eternally begotten of the Father,
God from God, Light from Light,
true God from true God,
begotten , not made, one in Being
with the Father.
Through him all things were made.
For us men and for our salvation
he came down from heaven:
by the power of the Holy Spirit
he was born of the Virgin Mary,
and became man.
For our sake he was crucified
under Pontius Pilate;
he suffered, died, and was buried.
On the third day he rose again
in fulfillment of the Scriptures;
he ascended into heaven
and is seated at the right hand of the Father.
He will come again in glory
to judge the living and the dead,
and his kingdom will have no end.
We believe in the Holy Spirit,
the Lord, the giver of life,
who proceeds from the Father and the Son.
With the Father and the Son
he is worshiped and glorified.
He has spoken through the prophets.
We believe in one holy catholic
and apostolic Church.
We acknowledge one baptism
for the forgiveness of sins.
We look for the resurrection of the dead,
and the life of the world to come.
Amen.
2012 version
I believe in one God, the Father almighty,
maker of heaven and earth,
of all things visible and invisible.
I believe in one Lord Jesus Christ,
the Only Begotten Son of God,
born of the Father before all ages.
God from God, Light from Light,
true God from true God,
begotten, not made, consubstantial
with the Father;
Through him all things were made.
For us men and for our salvation
he came down from heaven,
and by the Holy Spirit was incarnate
of the Virgin Mary,
and became man.
For our sake he was crucified
under Pontius Pilate,
he suffered death and was buried,
and rose again on the third day
in accordance with the Scriptures.
He ascended into heaven
and is seated at the right hand of the Father.
He will come again in glory
to judge the living and the dead
and his kingdom will have no end.
I believe in the Holy Spirit,
the Lord, the giver of life,
who proceeds from the Father and the Son,
who with the Father and the Son
is adored and glorified,
who has spoken through the prophets.
I believe in one, holy, catholic,
and apostolic Church.
I confess one baptism for the forgiveness of sins
and I look forward to the resurrection
of the dead and the life of the world to come.
Amen.