Bahrain's rulers opened a "national dialogue" on Saturday aimed at getting reforms back on track after a deadly March crackdown on protestors, buoyed by an 11th-hour decision by the main opposition bloc to take part.
Parliament speaker Khalifa Dhahrani told the opening session, which was broadcast live by state television, that the dialogue would have "no preconditions and no ceiling" on the demands that could be raised by delegates.
He said the aim was to draw up "common principles for the relaunch of the political reform process".
The authorities had come under huge pressure from their Western allies to begin a dialogue with the opposition after they crushed month-long protests in mid-March with military backing from the Gulf neighbours.
The crackdown sparked an outcry from international human rights groups and saw this year's Bahrain Grand Prix and the Gulf state's credit rating slashed.
The main opposition bloc, the Islamic National Accord Association (Al- Wefaq), joined the dialogue after a protracted debate on whether to take part that was only resolved late Friday.
Senior Al-Wefaq official Khalil Al-Marzoug said the group's five-strong delegation would maintain its demand for the prime minister to be drawn in future from the majority bloc in parliament, the Manama daily 'Al-Wasat' reported on Saturday. Incumbent Prime Minister Sheikh Khalifa bin Salman al-Khalifa, an uncle of King Hamad, has been in office ever since independence from Britain in 1971 and is widely despised by the opposition. "We do not intend to sabotage the dialogue but we do intend to bring to it the demands of the people," Marzoug was quoted as saying.
In an address to supporters on Friday, the movement's leader Sheikh Ali Salman insisted: "Al-Wefaq will not abandon the demands of the people which are an elected government, a fair electoral law and an elected parliament with full powers."
Under Bahrain's current constitution, an elected lower house shares legislative powers with an appointed upper house. Al-Wefaq boycotted parliamentary elections in 2002 in protest at the division of powers, although it took part in 2006 and 2010, winning a majority of the vote.
Sheikh Salman also demanded the release of all prisoners detained as part of the government's crackdown, insisting his party would "accept nothing less."
Security forces detained hundreds of people in a wave of arrests following the crackdown. Al-Wefaq had threatened not to take part in the dialogue in protest at being invited to choose just five out of the 300 delegates, even though it won all 18 seats which it contested in the 40-seat lower house last year.
Its 18 MPs all tendered their resignation in March in protest at the crackdown. After Saturday's formal opening of the dialogue, delegates were expected to meet three times a week to discuss not only political reform but the whole range of issues from economic and social issues to naturalisation.