The Greek Cypriot and Turkish Cypriot communities have been split since Turkey invaded the north in 1974, following a Greek-inspired coup.
Mr Clerides may accept Mr Denktash's demand for a rotating federal presidency: a Greek Cypriot one time, a Turkish Cypriot the next.
Mr Ozal claimed PPI "might have been victim of those whose purpose is first and foremost to undermine the Turkish Cypriot economy and the interests of Turkey".
But only Turkish or Turkish Cypriot airlines can fly to the north's rather mournful airport at Erecan, so foreign holidaymakers must pay a lot more by travelling via Turkey.
He is demanding recognition for the Turkish Cypriot part of the island, and says this will be the only way to reunify Cyprus in a two state confederation.
The Turkish Cypriot leader, Rauf Denktash, says the decision to allow Cyprus to apply for EU membership without a political settlement will make the division of the island permanent.
He was born in east London to a Turkish Cypriot mother and an Antiguan father and has been involved in anti-racism campaigns, acting as an ambassador for the group Kick It Out.
On the Turkish Cypriot side, Mehmet Ali Talat also says he is committed to a deal, and his time may be running out: his nationalist opponents thumped his party in legislative elections recently, and Mr Talat could be turfed out of office next year.
But if talks fail, the EU has said it is prepared to admit the Greek part alone, leaving the impoverished Turkish Cypriot community out in the cold. (The Greek bit was one of the ten countries invited to join in Copenhagen.) Were that to happen, the Greek Cypriots would most likely oppose Turkish membership for some years.
Under a UN special envoy, Alexander Downer, the Greek-Cypriot president (Demetris Christofias) and his Turkish-Cypriot counterpart (Dervish Eroglu since March 2010), have held 100 meetings since September 2008.
While Mr Karamanlis is keen to help Turkey along the road to EU membership, he must contend with elderly Greek-Cypriot leaders who doubt whether they can rub along with their Turkish-Cypriot counterparts in a federal state.
An exaggeration, no doubt, but such was the extent of Turkish-Cypriot loathing for him.
UN-sponsored peace plan the failure of which is widely blamed on Rauf Denktash, the Turkish-Cypriot leader must restart.
Turkish-Cypriot wholesalers are keen to sell their fruit and vegetables in the south.
ECONOMIST: Is there still a chance for a settlement in Cyprus?
Mr Denktash, whose Turkish-Cypriot republic in the north remains recognised by no country except Turkey itself, sounds yet more stubborn.
The Oramses are a British couple who bought land in the north from a Turkish-Cypriot and built a holiday home.
The Turkish-Cypriot leader, Rauf Denktash, dug in his heels, demanding international recognition of his breakaway state before talks could begin.
And neither Greek-nor Turkish-Cypriot politicians look likely to come up with a settlement that could satisfy most people in both communities.
ECONOMIST: The island��s Greeks and Turks may yet be reconciled
However the biggest problem is not on the Turkish-Cypriot side, but the lack of pressure on the Greek-Cypriots to make concessions.
ECONOMIST: Northern Cyprus's new president: Enter Eroglu | The
EU's commissioner in charge of enlargement, has met Rauf Denktash, the Turkish-Cypriot leader, for the first time in more than a year.
Many think Cyprus should not have been let in before striking a deal to reunite the Turkish-Cypriot north with the internationally recognised south.
The rapprochement should consolidate over the next few months as the Greek- and Turkish-Cypriot governments adopt measures to help the two economies converge.
ECONOMIST: Is there still a chance for a settlement in Cyprus?
Talk of reaching a framework agreement that is sufficiently robust to win Turkish-Cypriot voters back to Mr Talat is risky and may well not work.
The court heard Nadir, a British citizen of Turkish-Cypriot background, was a well-respected businessman in Turkey and a major employer in Turkey and northern Cyprus.
Whatever Turkish-Cypriot identity once existed is now being diluted fast.
The demonstration, large by Turkish-Cypriot standards, took place a few days before official celebrations on July 20th to mark the 27th anniversary of Turkey's military intervention on the island.
Sitting in his presidential palace, by the window through which Makarios escaped in July 1974 and in sight of the Turkish-Cypriot flag painted provocatively on the Pentadaktylos mountains, Mr Christofias is emphatic.
But if the Greek-Cypriots vote no to the plan while their Turkish-Cypriot neighbours vote yes, the moral advantage enjoyed by the Greek side as the main victims of the 1974 events would be overturned.
And, according to one Turkish-Cypriot survey, only 8% want integration with Turkey, against 32% who favour a loose confederation with the Greek-Cypriots, 23% who want full independence and 5% who dream of the old, undivided island.
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