JAPAN'S All Nippon Airways, the biggest customer of Boeing's glitch-hit Dreamliner, confirmed yesterday it would restart flights with the modified high-tech plane at the start of next month.

ANA will resume services from June 1 "following the successful completion of a series of battery system modifications, safety checks and test flights," it said in a statement.

"Our engineers have worked closely with Boeing to undertake the required improvements and we are fully satisfied with the safety of our 787 fleet."

Last month a modified Dreamliner safely took to the skies over Tokyo with top Boeing and ANA executives aboard, as the planemaker and its leading client sought to reassure passengers over the jetliner.