LONDON (AFP) Swiss rider Michael Albasini remained on top of the overall classification in the Tour of Britain Thursday as German teammate Andre Greipel claimed his second success on the race. Greipel, who rides for the HTC-Columbia team, took out a bunch sprint after the 189 km-long sixth stage, the longest of the race, from Kings Lynn to Great Yarmouth on Englands east coast. Albasini finished in the pack as Borut Bozic took just two seconds out of his lead, with the Swiss a healthy one minute and 26 seconds in front in an event where Australias Richie Porte is still in contention. The race finishes in London on Saturday.