A spokeswoman for the Attorney General's Office said the sentence will be referred to the Court of Appeal, where three judges will decide whether or not the sentence is unduly lenient.
Having carefully reviewed this case, the Attorney General, Dominic Grieve QC MP, has decided to refer the sentence of Lewis Gill to the Court of Appeal for review.
The case will in due course be heard by three Court of Appeal judges who will decide whether they should increase the sentence.
More top news
This summer's fundraising juggernaut, the ALS Ice Bucket challenge, has raised almost £7m in the fight against Motor Neurone Disease.
Winning entries from the Astronomy Photographer of the Year 2014 competition have been unveiled.
A shot of a chameleon using its tongue to grab dinner has snatched a top photography award.