The family of a Derbyshire teenager who died on the Greek holiday island of Zante are calling for the investigation into his death to be reopened.
Matthew Cryer, 17, from Killamarsh, sustained head injuries outside a bar in Laganas on 21 July 2008.
A UK coroner concluded Matthew had been unlawfully killed and criticised the Greek authorities for failing to find out how he was hurt.
Matthew's family are holding a protest outside the Greek Embassy in London.
David Cryer, Matthew's father, said: "MPs have written to the Greek ambassador and he's not replied.
"So we're trying a direct approach. We're handing in a letter asking for help to push things forward to get Matthew's case investigated properly."
A Greek Embassy spokesman said an official had met the family.
Spyridon Diamantis from the embassy said: "The charge d'affaires met the father of Mr Cryer and accepted his letter, we will send it immediately to the Greek authorities in Athens.
"We cannot formally request the inquiry to be reopened but we want to help the family.
"We fully trust the Greek judicial system."
The teenager died outside the Cocktails and Dreams nightclub.
He was on his first holiday abroad without his family.
Post-mortem examinations were carried out both in Greece and by a Home Office pathologist in Britain.
Matthew had sustained 20 separate injuries and widespread bruising was found on his body.
It was initially claimed his injuries had been caused by excessive drinking.
Witnesses told the inquest that Matthew had been violently thrown on to the street by doormen.