Alternattiva Demokratika has called for an independent inquiry to establish what motivated the change in technical specifications late in the tendering process for the Delimara power station extension.

AD said the inquiry should see whether the changes were the result of lobbying from sources close to the bidders or their advisers, adding the Prime Minister could no longer avoid giving “clear and honest answers to the public’s legitimate questions”.

Referring to a letter of formal notice sent by the European Commission on the tender, AD said it had been pointed out that the change in technical specifications in the tendering process was not required for compliance with EU legislation.

The change saw emission limits being increased for diesel-fired power plants but retained set emission values for gas plants, giving those offering a diesel power plant an unfair advantage.

Malta could expect to pay hefty penalties if it was found to be in breach of European procurement directives, AD said.