Eon, Germany’s largest energy group, on Tuesday for the first time signalled its willingness to compromise with Spanish authorities in an attempt to speed up its €27bn ($34.5bn) takeover bid for Endesa.

Wulf Bernotat, Eon chief executive, said he could compromise on some of the 19 conditions imposed by the CNE, the Spanish energy regulator, but would not be forced into selling assets such as power stations.