Case C-294/18: Judgment of the Court (Tenth Chamber) of 2 May 2019 (request for a preliminary ruling from the markkinaoikeus — Finland) — proceedings brought by Oulun Sähkönmyynti Oy (Reference for a preliminary ruling — Energy efficiency — Directive 2012/27/EU — Article 11(1) — Cost of access to metering and billing information — Right of final customers to receive all their bills and billing information relating to their energy consumption free of charge — Electricity network charges — Discount on electricity network charges granted by an electricity retail sales company to customers who have chosen electronic billing)