Mainland bureaucracy has cost a microlight round-the-world record attempt five days. British pilots Brian Milton, 55, and Keith Reynolds, 45, flew into Kai Tak airport at 7.30 am yesterday. They are attempting to fly around the world in 80 days, following the fictitious journey of Phileas Fogg. However, they were grounded in Hanoi, Vietnam, for five days awaiting flight permission from Beijing. GT Global Flyer spokesman Sarah Browse said: 'We submitted four different flight paths to the Chinese. 'They kept saying it wasn't right for technical reasons. But, finally, they said it was OK. We expected them to be a bit slow, but not that long.' The duo's single-engine microlight aircraft is eight days behind schedule, after also losing three days in Al Qaysumah, Saudi Arabia, with engine problems.