What is the song that goes 'Tick Tock goes the clock until River kills the Doctor' from Doctor Who?

Tick tock goes the clock

And what now shall we play

Tick tock goes the clock

Now summer's gone away?

Tick tock goes the clock

And what then shall we see?

Tick tock until the day

That thou shalt marry me.

Tick tock goes the clock

And all the years they fly

Tick tock and all too soon

You and I must die

Tick tock goes the clock

We laughed at fate and mourned her

Tick tock goes the clock

Even for the Doctor

Tick tock goes the clock

He cradled her and he rocked her

Tick tock goes the clock

Even for the Doctor

Doctor, brave and good,

He turned away from violence

When he understood

The falling of the Silence.

Tick tock goes the clock

He gave all he could give her

Tick tock goes the clock

Now prison waits for River