About M&S Energy
M&S Energy is the result of a partnership between Marks & Spencer and SSE. Customers receive energy supplied by SSE.
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Customer service for existing customers - 0800 294 3263
Contact Which? Switch by phone
You can call us on 0800 410 1149 or 01259 220 235.
Tired of poor customer service from your energy supplier? The results o four 2018 Which? energy satisfaciton survey reveal how customers rate 31 gas and electricity suppliers in Great Britain. Use them to help find the best energy company for you.
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