Found it - the book is called Little Laureates of the North West!
It says Tomster (aged 9)
They were learning about Greek Mythology and had to write a poem about an evil monster called the Chimera (no I have never heard of it either )
The Chimera was an evil beast
A reign of terror,
For many, many years.
The lion's head roared with rage,
The goat's body galloped with glory,
The serpent's tail hissed with hate.
Appollo, he slayed the giant beast!
He took it to the limit,
He stabbed it to it's death
The poison from its heart,
Think he's gonna be a Goth
Its demise.