* Sterling falls 0.7% in early Asian trade
* British parliament votes to force Brexit delay
* PM Johnson sends EU unsigned letter seeking Brexit extension
* UK says Brexit will happen on Oct. 31
* Graphic: World FX rates in 2019 tmsnrt.rs/2egbfVh
By Tomo Uetake
SYDNEY, Oct 21 (Reuters) - Sterling fell over half a percent against the dollar on Monday, slipping from five-month highs after the British parliament delayed a crucial vote on a Brexit withdrawal agreement.
The move derailed Prime Minister Boris Johnson's plan for a decision on his withdrawal deal, but the pound held the bulk of its recent rally on confidence that a disorderly exit from the European Union would be avoided.
In early Asian trade, the pound fell 0.72% to $1.2896, having hit a five-month peak of $1.2990 on Friday and closing the week just below the $1.30 mark, a 6.5% surge since Johnson struck an EU divorce deal on Oct. 10.
Lawmakers on Saturday voted to withhold a decision on Johnson's deal, a move that forced him to seek from the EU a third postponement of Britain's departure from the bloc. Britain's exit had been envisaged for Oct. 31.
But Johnson added another note saying he was opposed to an extension and British government minister Michael Gove said on Sunday Brexit will happen by Oct. 31 as the government seeks to get the Brexit bill through the parliament.
Analysts said the market focus will turns to this week's vote on Boris Johnson's deal. Foreign Secretary Dominic Raab told the BBC overnight that he was confident enough lawmakers would back the deal this week.
"The weekend's events, if anything, have further reduced the risk of disorderly exit," said Adam Cole, chief currency strategist at RBC Capital Markets in London.
"If there is a knee-jerk negative reaction in the pound as we emerge from the weekend with a greater overhang of uncertainty than hoped and some of the long positions are unwound, it should be faded soon."
The European Union will play for time rather than rush to decide on London's reluctant request to delay Brexit again, diplomats said on Sunday.
While weary of the Brexit process, EU leaders are keen to avoid a disorderly exit and are unlikely to reject the request. They hope the deal can eventually be approved in London.
Goldman Sachs said on Sunday that it lowered the probability of a no-deal Brexit to 5% from 10% and maintained its baseline view that the UK will leave the EU on Oct. 31.
"The uncertainty is likely to weigh on sterling when trading resumes in Asia Pacific on Oct. 21. Volatility will remain elevated until a clearer picture emerges," said Marc Chandler, chief market strategist at Bannockburn Global Forex in New York.
The euro eased 0.15% to $1.1155 versus the greenback, off Friday's two-month high of $1.1172.
The dollar was little changed at 108.41 to the safe-haven yen, still not far from its 2-1/2-month high of 108.94 yen marked on Thursday.
Reporting by Tomo Uetake; editing by Richard Pullin