UPDATE 1-Sterling extends losses as Brexit impasse prevails

* Graphic: World FX rates in 2019

* Graphic: Trade-weighted sterling since Brexit vote (Updates prices, add charts)

LONDON, Sept 26 (Reuters) - Sterling fell further on Thursday, touching a two-week low as investors waited for parliament’s next step to break the Brexit impasse and as opposition leaders gathered to discuss tactics.

The European Union’s Brexit negotiator, Michel Barnier, said Britain had yet to provide “legal and operational” proposals for an agreement on exiting the bloc at the Oct. 31 deadline.

The UK Supreme Court dealt Prime Minister Boris Johnson a blow on Tuesday when it ruled he had unlawfully suspended parliament. The ruling reinforced belief that Britain was unlikely to leave the EU without a deal on Oct. 31, but parliament remains split, early elections look inevitable and Johnson remains adamant that Britain will leave at the end of next month.

Those fears eliminated all sterling’s gains since the Supreme Court ruling, for its biggest one-day fall against the dollar in two weeks. By 0815 GMT, it had slipped 0.4% to $1.2303. It was down 0.3% against the euro at 88.82 pence

“We don’t know where things will go with Brexit. That’s being manifested in sterling more than any other asset,” said Fahad Kamal, chief market strategist at Kleinwort Hambros.

“What we have done in the face of unknowable political outcomes and daily volatility is to make sure our portfolios can deal with any big moves, big rallies or big falls,” he added.

Implied volatility gauges in sterling/dollar - a measure of expected swings in a currency - rose. They had fallen after the court ruling

Chartists see the next big support level for sterling at around $1.2280 - the 50-day moving average, a technical indicator that refers to the currency’s average closing price over the past 50 days.

British opposition Labour leader Jeremy Corbyn will meet other opposition leaders later in the day, as they discuss how to stop Johnson from quitting the EU on Oct. 31 without a deal if he fails to secure an agreement with Brussels by Oct. 19.

Reporting by Sujata Rao; Editing by Susan Fenton