INFIGHTING among both employers and unions is seen as the biggest threat to candidates in the new Hotels and Catering functional constituency for the Legislative Council elections in September. Intense lobbying and negotiations are under way in both camps to agree candidates for Group 6 of the nine new functional constituencies. Tommy Cheung Yu-yan, 50, who is tipped to represent restaurant employers and managers in the contest, said: 'Putting up more than one candidate could only weaken the support for the employers' bid.' Another hopeful, David Ng Tak-leung, 54, who had announced his attention to join the battle, has now been co-opted by Mr Cheung as his campaign manager. Another hopeful and Liberal Party member, Michael Li Hon-sing, who is supported by the Federation of Hotel Owners, was facing heavy lobbying from the party to abandon his plan. Mr Cheung is said to stand a better chance than Mr Li because employees in restaurants and catering greatly outnumber hotel workers. According to government figures, workers in the restaurants and catering business totalled more than 170,000, with 35,000 workers in the hotel industry. The main restaurant workers' unions are also trying to agree on a candidate. Chan Wai-lun of the Federation of Hong Kong and Kowloon Trade Union said his union was keen to liaise with others to come up with one candidate from the employees' side. Mr Chan, tipped to be his union's candidate, said that other big unions, including both the pro-China and pro-Taiwan groups, had yet to announce their intentions. GROUP 6: (203,000 potential electors). Includes restaurant workers; bartenders; herbal drink store workers; hotel workers; hostel workers.