Pan-democrats yesterday restated they were united in producing a single candidate from the camp to contest a by-election for Hong Kong Island constituency. Lawmakers from both the Democratic Party and the Civic Party played down the suggestion of another possible candidate from within the camp standing in the election, emphasising that the most important factor at the moment was to devise a fair and transparent selection mechanism. The Democratic Party said its deadline for expressing interest in running for the by-election was yesterday and the only member who did so was Kam Nai-wai. The party must now nominate him to run. A local news report and column written by independent lawmaker Albert Cheng King-hon both mentioned the Civic Party's Claudia Mo Man-ching as another possible candidate yesterday. But the Civic Party's Ronny Tong Ka-wah, said: 'I've only just had a meeting with Claudia and she didn't express any interest.' Party leader, Audrey Eu Yuet-mee, said it was natural for there to be a certain amount of speculation at the moment, but the most important thing was that 'the most suitable candidate emerges'. Privately, pan-democrats have expressed concern there was an attempt to split the camp, or create an image of internal conflict by circulating rumours through the media that there were more candidates. Tanya Chan Shuk-chong of the Civic Party has also been named as a possible candidate. Both Ms Chan and Ms Mo have both said that they have never expressed such an interest and have not discussed the possibility with the party. Democratic Party member Yeung Sum, however, said it did not concern him that more names were mentioned. 'You can't stop it,' he said. 'The most important thing is to come up with a fair and open selection mechanism, and the emergence of a single candidate to represent the pan-democrats.' A Hong Kong Island legislative council seat was left vacant by the death of Ma Lik, former chairman of the Democratic Alliance for the Betterment and Progress of Hong Kong. The by-election will be held on December 2.