One of the UK's biggest energy suppliers has called for petrol station-style pricing in a bid to help consumers identify the best deals.
EDF Energy, which supplies 5.5 million households and businesses, said it will implement single-unit pricing for gas and electricity if all other suppliers also committed to doing so.
It would mean that customers would only need one price - the unit price - to compare between different suppliers.
Energy prices are currently set regionally with some suppliers including a standing charge and a price for each unit of electricity and gas consumed.
Other suppliers operate a two tier pricing structure, where customers are charged a lower unit rate once a certain amount of energy has been used.
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The 21-year-old, who was arrested on Sunday, also allegedly injured two other people in the attack in the German city of Reutlingen.
She was going to the aid of a family member who got out of the car in the middle of the park and was dragged away by a different tiger.
The man, who was in his 30s, has not been identified, while several other people are believed to have suffered serious injuries.