Immigration and Customs officers fear they will not be able to get to work on time or will miss the last train home when opening hours at Lowu and Lok Ma Chau are extended next month. The officers hope train services will be extended because using alternative transport to and from the border could mean travelling times of up to five hours a day for those living on Hong Kong Island. At present, Lowu opens from 6.30am to 11.30pm and Lok Ma Chau from 7am to 10pm. From December 1, both Lowu and Lok Ma Chau will be open from 6.30am to midnight. Wong Tong-shing, chairman of the Hong Kong Immigration Department Staff Association, said that while Lowu would close 30 minutes later, the last train would only be put back 10 minutes, from 12.20am to 12.30am. 'Our colleagues working the late shift at Lowu may miss the last train. Officers often need to stay behind after the border is closed to clear the work for the day and get changed,' he said. One immigration officer, who lives on Hong Kong Island and works at Lok Ma Chau, said officers there would face an even bigger problem. Currently, officers report to work 30 minutes before the border opens at 7am and many on Hong Kong Island already take the earliest train at 5.30am from Hunghom. 'We arrive in Sheung Shui at 6.05am and take the government shuttle bus at 6.15am to Lok Ma Chau. But in future, we'll need to report to work at 6am,' he said. He added officers on the late shift, who took the shuttle bus to Sheung Shui to catch the last train, would have to rush in future to get the last train from Sheung Shui at 12.35am after closing the border at midnight. 'Missing the last train means I'll have to take a minibus to Mongkok to change to another mode of transport to get home. 'This could add an extra hour to my trip. The total travelling time for work could be 4.5 to five hours a day,' the officer said. Chairman of the Hong Kong Customs Officers' Union Ko Man-bun hoped the department could ask for an extension of train services and give officers living in North District the border shifts. A spokeswoman for the Kowloon-Canton Railway Corporation said: 'Extending the last train to 12.30am is already our limit, as we need time for maintenance.' A spokesman for the Customs and Excise Department said it believed officers on the late shift could catch the last train at 12.30am and that the shuttle bus to Sheung Shui could be adjusted. Secretary for Economic Services Sandra Lee Suk-yee said yesterday no assessment had been conducted on the economic impact of opening the Lowu and Lok Ma Chau checkpoints 24 hours a day, but that it remained a long-term objective of the Government to introduce round-the-clock operations at the border checkpoints. Planning Department officials are due to conduct a large-scale cross-border survey from tomorrow until November 29 of the flow of people and goods at eight border checkpoints: Lowu, Lok Ma Chau, Sha Tau Kok, Man Kam To, Hunghom station, Chek Lap Kok airport and the Macau and China ferry terminals. A total of 43,000 passengers and 7,000 drivers will be questioned.