Infralec was the electricity distribution business owned by Hyder

Hyder (defunct company)

Hyder was a Welsh water, gas and electricity multi-utility and infrastructure company created in 1996. It broke up in 2001 following a financial crisis.-History:...

. Infralec was established in February 2000 to operate the electricity distribution network previously operated under the SWALEC

SWALEC

SWALEC was an electricity supply and distribution company which was bought out in 1996 for £872m following the de-regulation of the electricity supply industry in the UK....

 brand before Swalec was sold to British Energy

British Energy

British Energy was the UK's largest electricity generation company by volume, before being taken over by Électricité de France in 2009. British Energy operated eight former UK state-owned nuclear power stations and one coal fired power station....

.

In 2001 Hyder was purchased by Western Power Distribution

Western Power Distribution

Western Power Distribution is the trading identity of four electricity distribution companies - WPD South West , WPD South Wales and WPD Midlands...

who sold off most parts of the organisation but kept Infralec which was rebranded as WPD South Wales.