How long is the flight from london to rio de janeiro??

On my ticket says that im leaving london at 21.45 and getting to rio de janiero at 8.05am 8.05 am brazil time or london's time?? i called british airways and the automated service said that im going to rio de janeiro via sao paulo and i will get to sao paulo at 7.05 and then get to rio at 8.05./. and it said local time.. whos localtime.. london's or brazil's local time??