BRUSSELS, Sept 18 (Reuters) - Hitachi has offered to sell assets in France and Germany in a bid to address EU antitrust concerns about its proposed 1.7 billion-euro ($1.8 billion) buy of Thales' GTS railway signalling business, a Hitachi spokesperson said on Monday.

"The proposed remedy includes the divestment of our mainline signalling business in France and Germany," the spokesperson said, confirming a Reuters story published last week. ($1 = 0.9355 euro) (Reporting by Foo Yun Chee; editing by Jonathan Oatis)