Almost one in ten companies suffered some disruption as a result of the millennium date change, according to a survey by the Office for National Statistics. The poll of 1,144 companies found that 1,070 respondents suffered no adverse effect. However, 74 companies said their activities had been negatively affected since 1 January. The main factors blamed were in-house computers, increased wage demands, low customer demand and the longer than normal holiday. Five companies said they had laid off staff as a result of millennium date change problems.