The industry regulator Ofgem has urged customers to take meter reading immediately and not to switch at the moment to avoid problems. The regulator will appoint a new supplier. Once you have been notified you can then negotiate a new tariff or decide to switch. 

Spark is seventh utility supply company to fold this year as a result of rising wholesale costs and pressure of competition. Many of the smaller companies owe millions of pounds in unpaid renewable energy subsidies to Ofgem after missing the deadline of 31st October 2018. 

All consumers will pay the price for the chaos in the industry. After the collapse of GB Energy in 2016 it cost us a collective £14 million in Last Resort Supply Payments. 

Ofgem have imposed new financial and customer service tests for new entrants but these do not apply to the existing suppliers. So expect more companies to go the same way.