The main centre-right opposition GERB party is tipped to win the election.

One GERB official warned of another vote by Christmas if the talks fail.

He has previously given unofficial backing to GERB, which did not adopt Attack policies.

The main opposition, centre-right GERB party is expected to top the Oct 5 polls.

But Borissov's GERB party voted against the censure motion in the European Parliament last week.