* EU exec proposes 2.9 percent increase
* Tries to meet some of euro parliament's demands
* Last-ditch budget talks in December
* EU commissioner says more optimistic deal will be reached
(Updates with budget commissioner's news conference)
By Marcin Grajewski
BRUSSELS, Nov 26 (Reuters) - The European Union's executive arm proposed a new 2011 draft budget on Friday to try to break a deadlock between the bloc's parliament and governments over spending plans.
Negotiations between the European Parliament and the EU's 27 governments on the budget, worth 123 billion euros ($164 billion) in 2010, collapsed this month, threatening to throw the bloc's financial planning into disarray.
The European Commission proposed a 2.9 percent rise compared with this year -- an increase that parliament accepted following pressure from governments eager to hold down spending as they are having to do at home.
Legislators had initially sought a 6.2 percent increase but dropped that demand in the face of fierce opposition.
The Commission also tried to meet some of parliament's demands for a greater say in future negotiations on spending.
Further talks will now follow, culminating in a meeting of EU finance ministers on Dec. 16 and a summit of heads of state and government scheduled on the same day.
"We are now more optimistic that there will be deal before the end of the year," EU Budget Commissioner Janusz Lewandowski told a news conference.
Previous talks failed when Britain, Sweden and the Netherlands rejected legislators' demands for guarantees over future EU financing and a declaration that would clarify their role in the bloc's financial planning under a new Lisbon treaty.
Parliament demanded more flexibility in the way the budget is spent and guarantees that lawmakers will be represented during negotiations on the EU's next, long-term budget after 2013, which could be worth 1 trillion euros. They also asked for a debate on giving the EU an independent source of income.
Diplomats say that, in parallel, France and Germany were pressing Britain to drop its tough stance.
One diplomat said envoys from EU governments agreed on Thursday to meet the parliament's demand on flexibility, but not other requests.
Failure to agree on the budget would be another sign of the EU's negotiating difficulties at a time it is scrambling to agree on a permanent bailout mechanism for euro zone countries facing financial problems.
Unless a deal is reached, next year's spending will be the same as in 2010, inflexible and disbursed in 12 equal instalments. Some programmes will be denied funding, such as the EU's fledgling diplomatic service, nuclear fusion project ITER and newly created bodies to supervise financial markets.
More than two-thirds of the EU budget goes on aid to poor regions and farm subsidies. The remainder is spent on research, foreign aid, internal security and administrative costs. The budget represents about 1 percent of the EU's economic output.
(Editing by Rex Merrifield, John Stonestreet)