2.43pm: Further confirmation that the Greek referendum is off, via Helena.
Kostas Yeitonas, a veteran member of Pasok, has just explained that two major things have happened since the morning:
"Papandreou has taken a step back and said he won't hold the referendum," he told Mega TV. "And Antonis Samaras has agreed to support the rescue package, which is a very good one for us, in parliament. He, too, has taken a step back."
Samaras had previously slammed the debt deal for "condemning Greece to deeper recession."