Marks and Spencer Energy and SSE have announced they will end their partnership of nine years.
In a joint statement issued last week (5 July) the pair announced the “amicable” split.
M&S Energy will still supply customers with electricity and gas until 28 September this year.
The joint statement said: “SSE and M&S have achieved a lot as partners, supplying 100 per cent green energy and supporting over 70 community energy projects under the M&S Energy brand.
“M&S Energy customers will continue to be supplied by SSE, with no interruption to their supply following this announcement.
“We will be writing to customers shortly to let them know about all the options available to them when the contract comes to an end in September 2018.
“SSE and M&S will work to ensure all communications are clear and transparent for customers.”
Following the split, M&S Energy customers on fixed deals will remain on their current tariff until it comes to an end.