FRANKFURT (Reuters) - Ford executives have offered to hold talks with labour representatives over planned structural changes at the U.S. carmaker's Cologne plant and other German sites but no concrete proposals have been put forward, a shop steward said on Saturday.

German union officials said on Wednesday that Ford would decide by mid-February how many jobs to cut in Europe.

(Reporting by Matthias Inverardi; Writing by Ludwig Burger; Editing by Alison Williams)